From 61b9683743016743aaee1ed0ba40601a35759c0c Mon Sep 17 00:00:00 2001
From: Ben Sturmfels <ben@sturm.com.au>
Date: Fri, 19 Sep 2025 17:21:47 +1000
Subject: [PATCH] Add !date and !decimal YAML constructors to avoid unsafe
 parsing mode

At some point the defaults for pyyaml were switched to safe parsing mode, so
that the previous arbitrary Python YAML tags like
"!!python/object/apply:datetime.date [2017, 9, 1]" no longer work. A better way
is to define our own explicit constructors to avoid unsafe mode.
---
 tests/data/imports.yml  | 887 ++++++++++++++++++++--------------------
 tests/test_importers.py |  20 +-
 2 files changed, 458 insertions(+), 449 deletions(-)

diff --git a/tests/data/imports.yml b/tests/data/imports.yml
index 0f02c8f..b6d81b7 100644
--- a/tests/data/imports.yml
+++ b/tests/data/imports.yml
@@ -2,13 +2,14 @@
   importer: patreon.Income2017Importer
   expect:
     - payee: Alex Jones
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["1500.00"]
+      # PyYAML 6 appears to require UnsafeLoader to handle complex Python tags.
+      date: !date "2017-09-01"
+      amount: !decimal "1500.00"
       currency: USD
       email: alex@example.org
     - payee: Dakota Doe
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["12.00"]
+      date: !date "2017-09-01"
+      amount: !decimal "12.00"
       currency: USD
       email: ddoe@example.org
 
@@ -19,15 +20,15 @@
       email: ajones@example.com
       tier: Even tier
       patreon_id: "1234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2"]
+      date: !date "2020-08-01"
+      amount: !decimal "2"
       currency: USD
     - payee: Breonna
       email: breonna@example.org
       tier: Odd tier
       patreon_id: "234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 2]
-      amount: !!python/object/apply:decimal.Decimal ["5.00"]
+      date: !date "2020-08-02"
+      amount: !decimal "5.00"
       currency: USD
 
 - source: PatreonPatronReport_2020-10-01.csv
@@ -37,15 +38,15 @@
       email: ajones@example.com
       tier: Even tier
       patreon_id: "1234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2"]
+      date: !date "2020-08-01"
+      amount: !decimal "2"
       currency: USD
     - payee: Breonna
       email: breonna@example.org
       tier: Odd tier
       patreon_id: "234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 2]
-      amount: !!python/object/apply:decimal.Decimal ["5.00"]
+      date: !date "2020-08-02"
+      amount: !decimal "5.00"
       currency: USD
 
 - source: PatreonPatronReport_2020-11-01.csv
@@ -55,27 +56,27 @@
       email: ajones@example.com
       tier: Even tier
       patreon_id: "1234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2"]
+      date: !date "2020-08-01"
+      amount: !decimal "2"
       currency: USD
     - payee: Breonna
       email: breonna@example.org
       tier: Odd tier
       patreon_id: "234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 2]
-      amount: !!python/object/apply:decimal.Decimal ["5.00"]
+      date: !date "2020-08-02"
+      amount: !decimal "5.00"
       currency: USD
 
 - source: PatreonEarnings.csv
   importer: patreon.ServiceFeesImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["61.73"]
+      date: !date "2017-09-01"
+      amount: !decimal "61.73"
       currency: USD
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["117.03"]
+      date: !date "2017-10-01"
+      amount: !decimal "117.03"
       currency: USD
 
 - source: PatreonEarnings2020.csv
@@ -85,75 +86,75 @@
       email: fjones@example.com
       user_id: "32101234"
       event_id: "30123456"
-      date: !!python/object/apply:datetime.date [2020, 12, 3]
+      date: !date "2020-12-03"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["5"]
-      tax_amount: !!python/object/apply:decimal.Decimal ["1"]
-      net_amount: !!python/object/apply:decimal.Decimal ["4.31"]
-      platform_fee: !!python/object/apply:decimal.Decimal ["0.25"]
-      processing_fee: !!python/object/apply:decimal.Decimal ["0.44"]
-      currency_fee: !!python/object/apply:decimal.Decimal ["0"]
+      amount: !decimal "5"
+      tax_amount: !decimal "1"
+      net_amount: !decimal "4.31"
+      platform_fee: !decimal "0.25"
+      processing_fee: !decimal "0.44"
+      currency_fee: !decimal "0"
     - payee: Barbara Johnson
       email: bjohnson@example.com
       user_id: "2345678"
       event_id: "34567890"
-      date: !!python/object/apply:datetime.date [2020, 12, 2]
+      date: !date "2020-12-02"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["6.06"]
-      tax_amount: !!python/object/apply:decimal.Decimal ["1.27"]
-      net_amount: !!python/object/apply:decimal.Decimal ["5.14"]
-      platform_fee: !!python/object/apply:decimal.Decimal ["0.31"]
-      processing_fee: !!python/object/apply:decimal.Decimal ["0.42"]
-      currency_fee: !!python/object/apply:decimal.Decimal ["0.19"]
+      amount: !decimal "6.06"
+      tax_amount: !decimal "1.27"
+      net_amount: !decimal "5.14"
+      platform_fee: !decimal "0.31"
+      processing_fee: !decimal "0.42"
+      currency_fee: !decimal "0.19"
     - payee: Alex Jones
       email: ajones@example.com
       user_id: "7654321"
       event_id: "456789090"
-      date: !!python/object/apply:datetime.date [2020, 12, 1]
+      date: !date "2020-12-01"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["14"]
-      tax_amount: !!python/object/apply:decimal.Decimal ["0"]
-      net_amount: !!python/object/apply:decimal.Decimal ["12.64"]
-      platform_fee: !!python/object/apply:decimal.Decimal [".7"]
-      processing_fee: !!python/object/apply:decimal.Decimal [".66"]
-      currency_fee: !!python/object/apply:decimal.Decimal ["0"]
+      amount: !decimal "14"
+      tax_amount: !decimal "0"
+      net_amount: !decimal "12.64"
+      platform_fee: !decimal ".7"
+      processing_fee: !decimal ".66"
+      currency_fee: !decimal "0"
 
 - source: PatreonEarnings.csv
   importer: patreon.CardFeesImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["52.47"]
+      date: !date "2017-09-01"
+      amount: !decimal "52.47"
       currency: USD
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["99.47"]
+      date: !date "2017-10-01"
+      amount: !decimal "99.47"
       currency: USD
 
 - source: PatreonVat.csv
   importer: patreon.VATImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2.00"]
+      date: !date "2017-09-01"
+      amount: !decimal "2.00"
       currency: USD
       country_code: AT
       country_name: Austria
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["3.30"]
+      date: !date "2017-09-01"
+      amount: !decimal "3.30"
       currency: USD
       country_code: BE
       country_name: Belgium
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["0.40"]
+      date: !date "2017-10-01"
+      amount: !decimal "0.40"
       currency: USD
       country_code: BG
       country_name: Bulgaria
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["6.05"]
+      date: !date "2017-10-01"
+      amount: !decimal "6.05"
       currency: USD
       country_code: CZ
       country_name: Czech Republic
@@ -162,26 +163,26 @@
   importer: patreon.PayoutImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2018, 4, 1]
-      amount: !!python/object/apply:decimal.Decimal ["123.45"]
-      pledges_amount: !!python/object/apply:decimal.Decimal ["0"]
-      transfer_amount: !!python/object/apply:decimal.Decimal ["123.45"]
+      date: !date "2018-04-01"
+      amount: !decimal "123.45"
+      pledges_amount: !decimal "0"
+      transfer_amount: !decimal "123.45"
       currency: USD
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2018, 5, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2345.67"]
-      pledges_amount: !!python/object/apply:decimal.Decimal ["0"]
-      transfer_amount: !!python/object/apply:decimal.Decimal ["2345.67"]
+      date: !date "2018-05-01"
+      amount: !decimal "2345.67"
+      pledges_amount: !decimal "0"
+      transfer_amount: !decimal "2345.67"
       currency: USD
 
 - source: StripePayments.csv
   importer: stripe.PaymentImporter
   expect:
     - payee: Dakota Smith
-      date: !!python/object/apply:datetime.date [2017, 11, 8]
-      amount: !!python/object/apply:decimal.Decimal ["100.00"]
-      fee: !!python/object/apply:decimal.Decimal ["3"]
-      tax: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-11-08"
+      amount: !decimal "100.00"
+      fee: !decimal "3"
+      tax: !decimal "0"
       currency: USD
       payment_id: ch_oxuish6phae2Raighooghi3U
       customer_id: cus_DohSheeQu8eng3
@@ -189,10 +190,10 @@
       payout_id: po_aeYees2ahtier8ohju7Eeyie
       description: "Payment for invoice #102"
     - payee: Dakota Jones
-      date: !!python/object/apply:datetime.date [2017, 10, 28]
-      amount: !!python/object/apply:decimal.Decimal ["50.00"]
-      fee: !!python/object/apply:decimal.Decimal ["1.4"]
-      tax: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-10-28"
+      amount: !decimal "50.00"
+      fee: !decimal "1.4"
+      tax: !decimal "0"
       currency: USD
       payment_id: ch_hHee9ef1aeyee1ruo7ochee9
       customer_id: cus_iepae2Iecae8Ei
@@ -204,65 +205,65 @@
   importer: stripe.PayoutImporter
   expect:
     - payee: Stripe
-      date: !!python/object/apply:datetime.date [2017, 11, 30]
-      amount: !!python/object/apply:decimal.Decimal ["-50"]
+      date: !date "2017-11-30"
+      amount: !decimal "-50"
       currency: USD
-      payment_count: !!python/object/apply:decimal.Decimal ["0"]
-      payment_gross: !!python/object/apply:decimal.Decimal ["0"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["0"]
-      payment_net: !!python/object/apply:decimal.Decimal ["0"]
-      refund_count: !!python/object/apply:decimal.Decimal ["1"]
-      refund_gross: !!python/object/apply:decimal.Decimal ["-50"]
-      refund_fees: !!python/object/apply:decimal.Decimal ["0"]
-      refund_net: !!python/object/apply:decimal.Decimal ["-50"]
-      collected_fee_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_gross: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_count: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_fees: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_net: !!python/object/apply:decimal.Decimal ["0"]
-      validation_count: !!python/object/apply:decimal.Decimal ["0"]
-      validation_fees: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_count: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_net: !!python/object/apply:decimal.Decimal ["0"]
-      total_count: !!python/object/apply:decimal.Decimal ["1"]
-      total_gross: !!python/object/apply:decimal.Decimal ["-50"]
-      total_fees: !!python/object/apply:decimal.Decimal ["0"]
-      total_net: !!python/object/apply:decimal.Decimal ["-50"]
+      payment_count: !decimal "0"
+      payment_gross: !decimal "0"
+      payment_fees: !decimal "0"
+      payment_net: !decimal "0"
+      refund_count: !decimal "1"
+      refund_gross: !decimal "-50"
+      refund_fees: !decimal "0"
+      refund_net: !decimal "-50"
+      collected_fee_count: !decimal "0"
+      collected_fee_gross: !decimal "0"
+      collected_fee_refund_count: !decimal "0"
+      collected_fee_refund_gross: !decimal "0"
+      adjustment_count: !decimal "0"
+      adjustment_gross: !decimal "0"
+      adjustment_fees: !decimal "0"
+      adjustment_net: !decimal "0"
+      validation_count: !decimal "0"
+      validation_fees: !decimal "0"
+      retried_payout_count: !decimal "0"
+      retried_payout_net: !decimal "0"
+      total_count: !decimal "1"
+      total_gross: !decimal "-50"
+      total_fees: !decimal "0"
+      total_net: !decimal "-50"
       payout_id: po_faegh6aeghishuethuoSoT2i
       destination_id: ba_chu0Woop5queewi2Ea1Aibah
       balance_txid: txn_EiKahrazei3aeMohk7EeDigh
       failure_txid: ""
     - payee: Stripe
-      date: !!python/object/apply:datetime.date [2017, 11, 29]
-      amount: !!python/object/apply:decimal.Decimal ["146.50"]
+      date: !date "2017-11-29"
+      amount: !decimal "146.50"
       currency: USD
-      payment_count: !!python/object/apply:decimal.Decimal ["2"]
-      payment_gross: !!python/object/apply:decimal.Decimal ["150"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["3.5"]
-      payment_net: !!python/object/apply:decimal.Decimal ["146.5"]
-      refund_count: !!python/object/apply:decimal.Decimal ["0"]
-      refund_gross: !!python/object/apply:decimal.Decimal ["0"]
-      refund_fees: !!python/object/apply:decimal.Decimal ["0"]
-      refund_net: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_gross: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_count: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_fees: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_net: !!python/object/apply:decimal.Decimal ["0"]
-      validation_count: !!python/object/apply:decimal.Decimal ["0"]
-      validation_fees: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_count: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_net: !!python/object/apply:decimal.Decimal ["0"]
-      total_count: !!python/object/apply:decimal.Decimal ["2"]
-      total_gross: !!python/object/apply:decimal.Decimal ["150"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.5"]
-      total_net: !!python/object/apply:decimal.Decimal ["146.5"]
+      payment_count: !decimal "2"
+      payment_gross: !decimal "150"
+      payment_fees: !decimal "3.5"
+      payment_net: !decimal "146.5"
+      refund_count: !decimal "0"
+      refund_gross: !decimal "0"
+      refund_fees: !decimal "0"
+      refund_net: !decimal "0"
+      collected_fee_count: !decimal "0"
+      collected_fee_gross: !decimal "0"
+      collected_fee_refund_count: !decimal "0"
+      collected_fee_refund_gross: !decimal "0"
+      adjustment_count: !decimal "0"
+      adjustment_gross: !decimal "0"
+      adjustment_fees: !decimal "0"
+      adjustment_net: !decimal "0"
+      validation_count: !decimal "0"
+      validation_fees: !decimal "0"
+      retried_payout_count: !decimal "0"
+      retried_payout_net: !decimal "0"
+      total_count: !decimal "2"
+      total_gross: !decimal "150"
+      total_fees: !decimal "3.5"
+      total_net: !decimal "146.5"
       payout_id: po_Do9pathoo9Pu8jaePhahJa0e
       destination_id: ba_chu0Woop5queewi2Ea1Aibah
       balance_txid: txn_ahsaixiene6Thie1aiti3tuo
@@ -273,32 +274,32 @@
   expect:
     - payee: Python Person A
       ledger template: nbpy2017 invoice ledger entry
-      date: !!python/object/apply:datetime.date [2017, 10, 19]
-      amount: !!python/object/apply:decimal.Decimal ["80.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["80.00"]
+      date: !date "2017-10-19"
+      amount: !decimal "80.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "80.00"
       ticket_rate: Early Bird (Ticket - Individual Supporter)
-      shirts_sold: !!python/object/apply:decimal.Decimal ["1"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "1"
+      shirt_price: !decimal "0"
       shirt_rate: "Complimentary for ticket holder (Supporter-level and above) (T-Shirt - Men's/Straight Cut Size L)"
       currency: USD
       status: Invoice
       invoice_id: "83"
-      invoice_date: !!python/object/apply:datetime.date [2017, 10, 19]
+      invoice_date: !date "2017-10-19"
     - payee: Python Person A
       ledger template: nbpy2017 payment ledger entry
-      date: !!python/object/apply:datetime.date [2017, 10, 19]
-      amount: !!python/object/apply:decimal.Decimal ["80.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["80.00"]
+      date: !date "2017-10-19"
+      amount: !decimal "80.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "80.00"
       ticket_rate: Early Bird (Ticket - Individual Supporter)
-      shirts_sold: !!python/object/apply:decimal.Decimal ["1"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "1"
+      shirt_price: !decimal "0"
       shirt_rate: "Complimentary for ticket holder (Supporter-level and above) (T-Shirt - Men's/Straight Cut Size L)"
       currency: USD
       status: Payment
       invoice_id: "83"
-      invoice_date: !!python/object/apply:datetime.date [2017, 10, 19]
+      invoice_date: !date "2017-10-19"
       payment_id: ch_ahr0ue8lai1ohqu4Gei4Biem
       stripe_id: ch_ahr0ue8lai1ohqu4Gei4Biem
 
@@ -307,31 +308,31 @@
   expect:
     - payee: Python Person B
       ledger template: nbpy2017 invoice ledger entry
-      date: !!python/object/apply:datetime.date [2017, 12, 3]
-      amount: !!python/object/apply:decimal.Decimal ["50.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["50.00"]
+      date: !date "2017-12-03"
+      amount: !decimal "50.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "50.00"
       ticket_rate: Ticket - Unaffiliated Individual
-      shirts_sold: !!python/object/apply:decimal.Decimal ["0"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "0"
+      shirt_price: !decimal "0"
       shirt_rate: ""
       status: Invoice
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 12, 3]
+      invoice_date: !date "2017-12-03"
       invoice_id: "304"
     - payee: Python Person B
       ledger template: nbpy2017 payment ledger entry
-      date: !!python/object/apply:datetime.date [2017, 12, 3]
-      amount: !!python/object/apply:decimal.Decimal ["50.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["50.00"]
+      date: !date "2017-12-03"
+      amount: !decimal "50.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "50.00"
       ticket_rate: Ticket - Unaffiliated Individual
-      shirts_sold: !!python/object/apply:decimal.Decimal ["0"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "0"
+      shirt_price: !decimal "0"
       shirt_rate: ""
       status: Payment
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 12, 3]
+      invoice_date: !date "2017-12-03"
       payment_id: ch_eishei9aiY8aiqu4lieYiu9i
       stripe_id: ch_eishei9aiY8aiqu4lieYiu9i
       invoice_id: "304"
@@ -341,31 +342,31 @@
   expect:
     - payee: Python Person C
       ledger template: nbpy2017 invoice ledger entry
-      date: !!python/object/apply:datetime.date [2017, 9, 5]
-      amount: !!python/object/apply:decimal.Decimal ["60.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["0"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-09-05"
+      amount: !decimal "60.00"
+      tickets_sold: !decimal "0"
+      ticket_price: !decimal "0"
       ticket_rate: Ticket - Talk Proposer
-      shirts_sold: !!python/object/apply:decimal.Decimal ["2"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["30.00"]
+      shirts_sold: !decimal "2"
+      shirt_price: !decimal "30.00"
       shirt_rate: "T-Shirt - Men's/Straight Cut Size M"
       status: Invoice
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 9, 5]
+      invoice_date: !date "2017-09-05"
       invoice_id: "11"
     - payee: Python Person C
       ledger template: nbpy2017 payment ledger entry
-      date: !!python/object/apply:datetime.date [2017, 9, 5]
-      amount: !!python/object/apply:decimal.Decimal ["60.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["0"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-09-05"
+      amount: !decimal "60.00"
+      tickets_sold: !decimal "0"
+      ticket_price: !decimal "0"
       ticket_rate: Ticket - Talk Proposer
-      shirts_sold: !!python/object/apply:decimal.Decimal ["2"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["30.00"]
+      shirts_sold: !decimal "2"
+      shirt_price: !decimal "30.00"
       shirt_rate: "T-Shirt - Men's/Straight Cut Size M"
       status: Payment
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 9, 5]
+      invoice_date: !date "2017-09-05"
       payment_id: ch_daer0ahwoh9oDeiqu2eimoD7
       stripe_id: ch_daer0ahwoh9oDeiqu2eimoD7
       invoice_id: "11"
@@ -376,12 +377,12 @@
   header_cols: 12
   expect:
     - payee: Amazon
-      date: !!python/object/apply:datetime.date [2016, 12, 20]
-      amount: !!python/object/apply:decimal.Decimal ["4.24"]
+      date: !date "2016-12-20"
+      amount: !decimal "4.24"
       currency: USD
     - payee: Amazon
-      date: !!python/object/apply:datetime.date [2017, 1, 7]
-      amount: !!python/object/apply:decimal.Decimal ["-.08"]
+      date: !date "2017-01-07"
+      amount: !decimal "-.08"
       currency: USD
 
 - source: Benevity2018.csv
@@ -389,17 +390,17 @@
   header_rows: 11
   header_cols: 17
   expect:
-    - date: !!python/object/apply:datetime.date [2017, 10, 28]
+    - date: !date "2017-10-28"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [20]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 20
+      match_amount: !decimal 0
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -408,16 +409,16 @@
       frequency: One-time
       transaction_id: 67890QWERT
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 30]
+    - date: !date "2017-10-30"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [25]
-      net_amount: !!python/object/apply:decimal.Decimal [25]
-      donation_amount: !!python/object/apply:decimal.Decimal [25]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 25
+      net_amount: !decimal 25
+      donation_amount: !decimal 25
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -426,16 +427,16 @@
       frequency: One-time
       transaction_id: 67890WERTY
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [10]
-      net_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 10
+      net_amount: !decimal 10
+      donation_amount: !decimal 0
+      match_amount: !decimal 10
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -444,16 +445,16 @@
       frequency: Unknown
       transaction_id: 67890ERTYU
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 0
+      match_amount: !decimal 20
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -462,17 +463,17 @@
       frequency: Unknown
       transaction_id: 67890RTYUI
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [30]
-      net_amount: !!python/object/apply:decimal.Decimal [30]
-      donation_amount: !!python/object/apply:decimal.Decimal [30]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 30
+      net_amount: !decimal 30
+      donation_amount: !decimal 30
+      match_amount: !decimal 0
       payee: Anonymous
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       corporation: Company B
       project: ""
@@ -486,16 +487,16 @@
   header_rows: 11
   header_cols: 21
   expect:
-    - date: !!python/object/apply:datetime.date [2017, 10, 28]
+    - date: !date "2017-10-28"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [20]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 20
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -504,16 +505,16 @@
       frequency: One-time
       transaction_id: 67890QWERT
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 30]
+    - date: !date "2017-10-30"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [25]
-      net_amount: !!python/object/apply:decimal.Decimal [25]
-      donation_amount: !!python/object/apply:decimal.Decimal [25]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 25
+      net_amount: !decimal 25
+      donation_amount: !decimal 25
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -522,16 +523,16 @@
       frequency: One-time
       transaction_id: 67890WERTY
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [10]
-      net_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 10
+      net_amount: !decimal 10
+      donation_amount: !decimal 0
+      match_amount: !decimal 10
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -540,16 +541,16 @@
       frequency: Unknown
       transaction_id: 67890ERTYU
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 0
+      match_amount: !decimal 20
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -558,16 +559,16 @@
       frequency: Unknown
       transaction_id: 67890RTYUI
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [30]
-      net_amount: !!python/object/apply:decimal.Decimal [30]
-      donation_amount: !!python/object/apply:decimal.Decimal [30]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 30
+      net_amount: !decimal 30
+      donation_amount: !decimal 30
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -576,16 +577,16 @@
       frequency: Recurring
       transaction_id: 67890TYUIO
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 18]
+    - date: !date "2017-10-18"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".1"]
-      match_fee: !!python/object/apply:decimal.Decimal [".2"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".1"
+      match_fee: !decimal ".2"
+      merchant_fee: !decimal ".15"
       fee_comment: null
       payee: Anonymous
       corporation: Company C
@@ -594,16 +595,16 @@
       frequency: Unknown
       transaction_id: 67890YUIOP
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 21]
+    - date: !date "2017-10-21"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".1"]
-      match_fee: !!python/object/apply:decimal.Decimal [".2"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".1"
+      match_fee: !decimal ".2"
+      merchant_fee: !decimal ".15"
       fee_comment: null
       payee: Anonymous
       corporation: Company C
@@ -618,16 +619,16 @@
   header_rows: 11
   header_cols: 23
   expect:
-    - date: !!python/object/apply:datetime.date [2019, 10, 28]
+    - date: !date "2019-10-28"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [20]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 20
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Dakota Smith
       corporation: Company A
@@ -636,16 +637,16 @@
       frequency: One-time
       transaction_id: 67890QWERT
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 30]
+    - date: !date "2019-10-30"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [25]
-      net_amount: !!python/object/apply:decimal.Decimal [25]
-      donation_amount: !!python/object/apply:decimal.Decimal [25]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 25
+      net_amount: !decimal 25
+      donation_amount: !decimal 25
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Dakota Smith
       corporation: Company A
@@ -654,16 +655,16 @@
       frequency: One-time
       transaction_id: 67890WERTY
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 19]
+    - date: !date "2019-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [10]
-      net_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 10
+      net_amount: !decimal 10
+      donation_amount: !decimal 0
+      match_amount: !decimal 10
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company B
@@ -672,16 +673,16 @@
       frequency: Unknown
       transaction_id: 67890ERTYU
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 19]
+    - date: !date "2019-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 0
+      match_amount: !decimal 20
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company B
@@ -690,16 +691,16 @@
       frequency: Unknown
       transaction_id: 67890RTYUI
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 19]
+    - date: !date "2019-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [30]
-      net_amount: !!python/object/apply:decimal.Decimal [30]
-      donation_amount: !!python/object/apply:decimal.Decimal [30]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 30
+      net_amount: !decimal 30
+      donation_amount: !decimal 30
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company B
@@ -708,16 +709,16 @@
       frequency: Recurring
       transaction_id: 67890TYUIO
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 18]
+    - date: !date "2019-10-18"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".3"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".3"
+      merchant_fee: !decimal ".15"
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company C
@@ -726,16 +727,16 @@
       frequency: Unknown
       transaction_id: 67890YUIOP
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 21]
+    - date: !date "2019-10-21"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".3"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".3"
+      merchant_fee: !decimal ".15"
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company C
@@ -748,9 +749,9 @@
 - source: BrightFunds.xls
   importer: brightfunds.DonorReportXLSImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2017, 10, 20]
+    - date: !date "2017-10-20"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal [120]
+      amount: !decimal 120
       payee: Dakota Smith
       corporation: Company
       company_name: ""
@@ -764,9 +765,9 @@
 - source: BrightFunds.csv
   importer: brightfunds.DonorReportImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2020, 10, 01]
+    - date: !date "2020-10-01"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal [15]
+      amount: !decimal 15
       payee: Company
       corporation: Company
       company_name: Company
@@ -776,9 +777,9 @@
       fund: ""
       on_behalf_of: Employed Person
       type: MatchingTransaction
-    - date: !!python/object/apply:datetime.date [2020, 9, 24]
+    - date: !date "2020-09-24"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal [15]
+      amount: !decimal 15
       payee: Employed Person
       corporation: Company
       company_name: Company
@@ -792,172 +793,172 @@
 - source: OReillyRoyalties.csv
   importer: oreilly.RoyaltiesImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 3, 31]
-      start_date: !!python/object/apply:datetime.date [2018, 3, 1]
+    - date: !date "2018-03-31"
+      start_date: !date "2018-03-01"
       paid_date: null
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["11.96"]
+      amount: !decimal "11.96"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2018, 2, 28]
-      start_date: !!python/object/apply:datetime.date [2018, 2, 1]
-      paid_date: !!python/object/apply:datetime.date [2018, 3, 29]
+    - date: !date "2018-02-28"
+      start_date: !date "2018-02-01"
+      paid_date: !date "2018-03-29"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["20.83"]
+      amount: !decimal "20.83"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2018, 1, 31]
-      start_date: !!python/object/apply:datetime.date [2018, 1, 1]
-      paid_date: !!python/object/apply:datetime.date [2018, 3, 29]
+    - date: !date "2018-01-31"
+      start_date: !date "2018-01-01"
+      paid_date: !date "2018-03-29"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["8.51"]
+      amount: !decimal "8.51"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 3, 31]
-      start_date: !!python/object/apply:datetime.date [2017, 3, 1]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-03-31"
+      start_date: !date "2017-03-01"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.91"]
+      amount: !decimal "26.91"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 1, 31]
-      start_date: !!python/object/apply:datetime.date [2017, 1, 1]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-01-31"
+      start_date: !date "2017-01-01"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["12.33"]
+      amount: !decimal "12.33"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 12, 31]
-      start_date: !!python/object/apply:datetime.date [2016, 12, 1]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2016-12-31"
+      start_date: !date "2016-12-01"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["9.15"]
+      amount: !decimal "9.15"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 9, 30]
-      start_date: !!python/object/apply:datetime.date [2016, 9, 1]
-      paid_date: !!python/object/apply:datetime.date [2016, 12, 16]
+    - date: !date "2016-09-30"
+      start_date: !date "2016-09-01"
+      paid_date: !date "2016-12-16"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.19"]
+      amount: !decimal "26.19"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 8, 31]
-      start_date: !!python/object/apply:datetime.date [2016, 8, 1]
-      paid_date: !!python/object/apply:datetime.date [2016, 11, 30]
+    - date: !date "2016-08-31"
+      start_date: !date "2016-08-01"
+      paid_date: !date "2016-11-30"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["27.58"]
+      amount: !decimal "27.58"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2010, 3, 31]
-      start_date: !!python/object/apply:datetime.date [2010, 1, 1]
-      paid_date: !!python/object/apply:datetime.date [2010, 3, 31]
+    - date: !date "2010-03-31"
+      start_date: !date "2010-01-01"
+      paid_date: !date "2010-03-31"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["73.85"]
+      amount: !decimal "73.85"
       payee: "O'Reilly Media, Inc."
 
 - source: OReillyPayments.csv
   importer: oreilly.PaymentsImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 3, 29]
-      paid_date: !!python/object/apply:datetime.date [2018, 3, 29]
+    - date: !date "2018-03-29"
+      paid_date: !date "2018-03-29"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["29.34"]
+      amount: !decimal "29.34"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 4, 27]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-04-27"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.91"]
+      amount: !decimal "26.91"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 4, 24]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-04-24"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["21.48"]
+      amount: !decimal "21.48"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 12, 16]
-      paid_date: !!python/object/apply:datetime.date [2016, 12, 16]
+    - date: !date "2016-12-16"
+      paid_date: !date "2016-12-16"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.19"]
+      amount: !decimal "26.19"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 11, 29]
-      paid_date: !!python/object/apply:datetime.date [2016, 11, 30]
+    - date: !date "2016-11-29"
+      paid_date: !date "2016-11-30"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["27.58"]
+      amount: !decimal "27.58"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2010, 3, 31]
-      paid_date: !!python/object/apply:datetime.date [2010, 3, 31]
+    - date: !date "2010-03-31"
+      paid_date: !date "2010-03-31"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["73.85"]
+      amount: !decimal "73.85"
       payee: "O'Reilly Media, Inc."
 
 - source: YourCause.csv
   importer: yourcause.DonationsImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 12, 20]
+    - date: !date "2018-12-20"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567891
-      amount: !!python/object/apply:decimal.Decimal [12]
-      original_amount: !!python/object/apply:decimal.Decimal [12]
-      received_amount: !!python/object/apply:decimal.Decimal [12]
-      donor_amount: !!python/object/apply:decimal.Decimal [12]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 12
+      original_amount: !decimal 12
+      received_amount: !decimal 12
+      donor_amount: !decimal 12
+      match_amount: !decimal 0
       dedication_type: ""
       dedication: ""
       designation: Note
       payee: Dakota Smith
       donor: Dakota Smith
       corporation: Company A
-    - date: !!python/object/apply:datetime.date [2018, 12, 31]
+    - date: !date "2018-12-31"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567893
-      amount: !!python/object/apply:decimal.Decimal [14]
-      original_amount: !!python/object/apply:decimal.Decimal [14]
-      received_amount: !!python/object/apply:decimal.Decimal [14]
-      donor_amount: !!python/object/apply:decimal.Decimal [14]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 14
+      original_amount: !decimal 14
+      received_amount: !decimal 14
+      donor_amount: !decimal 14
+      match_amount: !decimal 0
       dedication_type: ""
       dedication: ""
       designation: ""
       payee: Anonymous
       donor: Anonymous
       corporation: Company B
-    - date: !!python/object/apply:datetime.date [2018, 12, 20]
+    - date: !date "2018-12-20"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567895
-      amount: !!python/object/apply:decimal.Decimal [12]
-      original_amount: !!python/object/apply:decimal.Decimal [12]
-      received_amount: !!python/object/apply:decimal.Decimal [12]
-      donor_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [12]
+      amount: !decimal 12
+      original_amount: !decimal 12
+      received_amount: !decimal 12
+      donor_amount: !decimal 0
+      match_amount: !decimal 12
       dedication_type: ""
       dedication: ""
       designation: Note
       payee: Company A
       donor: Dakota Smith
       corporation: Company A
-    - date: !!python/object/apply:datetime.date [2018, 12, 31]
+    - date: !date "2018-12-31"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567897
-      amount: !!python/object/apply:decimal.Decimal [14]
-      original_amount: !!python/object/apply:decimal.Decimal [14]
-      received_amount: !!python/object/apply:decimal.Decimal [14]
-      donor_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [14]
+      amount: !decimal 14
+      original_amount: !decimal 14
+      received_amount: !decimal 14
+      donor_amount: !decimal 0
+      match_amount: !decimal 14
       dedication_type: ""
       dedication: ""
       designation: ""
       payee: Company B
       donor: Anonymous
       corporation: Company B
-    - date: !!python/object/apply:datetime.date [2018, 12, 15]
+    - date: !date "2018-12-15"
       currency: USD
       original_currency: GBP
       payment_id: "10006789"
       transaction_id: 2-34567899
-      amount: !!python/object/apply:decimal.Decimal ["12.50"]
-      original_amount: !!python/object/apply:decimal.Decimal [10]
-      received_amount: !!python/object/apply:decimal.Decimal ["12.50"]
-      donor_amount: !!python/object/apply:decimal.Decimal ["12.50"]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal "12.50"
+      original_amount: !decimal 10
+      received_amount: !decimal "12.50"
+      donor_amount: !decimal "12.50"
+      match_amount: !decimal 0
       dedication_type: ""
       dedication: ""
       designation: ""
@@ -968,7 +969,7 @@
 - source: EventBrite.csv
   importer: eventbrite.SalesImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 11, 27]
+    - date: !date "2018-11-27"
       currency: USD
       event_name: First Event
       event_id: "12345678901"
@@ -977,13 +978,13 @@
       payee: Alex Jones
       corporation: ""
       ticket_type: Discount Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["10"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.99"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["2.99"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["1"]
-      tax: !!python/object/apply:decimal.Decimal [0]
-    - date: !!python/object/apply:datetime.date [2018, 12, 6]
+      quantity: !decimal "1"
+      amount: !decimal "10"
+      total_fees: !decimal "3.99"
+      eventbrite_fees: !decimal "2.99"
+      payment_fees: !decimal "1"
+      tax: !decimal 0
+    - date: !date "2018-12-06"
       currency: USD
       event_name: First Event
       event_id: "12345678901"
@@ -992,13 +993,13 @@
       payee: Bret Baker
       corporation: ""
       ticket_type: Regular Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["30"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.99"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["2.99"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["1"]
-      tax: !!python/object/apply:decimal.Decimal [0]
-    - date: !!python/object/apply:datetime.date [2019, 1, 7]
+      quantity: !decimal "1"
+      amount: !decimal "30"
+      total_fees: !decimal "3.99"
+      eventbrite_fees: !decimal "2.99"
+      payment_fees: !decimal "1"
+      tax: !decimal 0
+    - date: !date "2019-01-07"
       currency: USD
       event_name: First Event
       event_id: "12345678901"
@@ -1007,13 +1008,13 @@
       payee: Cam Smith
       corporation: SampleCo
       ticket_type: Premium Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["60"]
-      total_fees: !!python/object/apply:decimal.Decimal ["6.39"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["4.39"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["2"]
-      tax: !!python/object/apply:decimal.Decimal [0]
-    - date: !!python/object/apply:datetime.date [2019, 1, 23]
+      quantity: !decimal "1"
+      amount: !decimal "60"
+      total_fees: !decimal "6.39"
+      eventbrite_fees: !decimal "4.39"
+      payment_fees: !decimal "2"
+      tax: !decimal 0
+    - date: !date "2019-01-23"
       currency: EUR
       event_name: Second Event
       event_id: "12345678902"
@@ -1022,34 +1023,34 @@
       payee: Jam Jones
       corporation: ""
       ticket_type: Discount Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["25"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.99"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["2.99"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["1"]
-      tax: !!python/object/apply:decimal.Decimal [0]
+      quantity: !decimal "1"
+      amount: !decimal "25"
+      total_fees: !decimal "3.99"
+      eventbrite_fees: !decimal "2.99"
+      payment_fees: !decimal "1"
+      tax: !decimal 0
 
 - source: GitHubSponsors.csv
   importer: github.SponsorsImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2020, 1, 2]
+    - date: !date "2020-01-02"
       payee: exampleA
       handle: exampleA
       email: ajones@example.com
       transaction_id: ch_1Gabcdefghijklmnopqrstuv
-      amount: !!python/object/apply:decimal.Decimal ["1"]
+      amount: !decimal "1"
       currency: USD
-    - date: !!python/object/apply:datetime.date [2020, 1, 3]
+    - date: !date "2020-01-03"
       payee: exampleB
       handle: exampleB
       email: ""
       transaction_id: 1023ABCD5678EFGHI
-      amount: !!python/object/apply:decimal.Decimal ["10"]
+      amount: !decimal "10"
       currency: USD
-    - date: !!python/object/apply:datetime.date [2020, 1, 4]
+    - date: !date "2020-01-04"
       payee: exampleC
       handle: exampleC
       email: info@example.com
       transaction_id: ch_1Gabcdefghijklmnopqrstuw
-      amount: !!python/object/apply:decimal.Decimal ["120"]
+      amount: !decimal "120"
       currency: USD
diff --git a/tests/test_importers.py b/tests/test_importers.py
index 01d66e6..605cffe 100644
--- a/tests/test_importers.py
+++ b/tests/test_importers.py
@@ -6,7 +6,6 @@ import importlib
 import itertools
 import pathlib
 import shutil
-import re
 
 import pytest
 import yaml
@@ -14,14 +13,23 @@ from import2ledger import importers, strparse
 
 from . import DATA_DIR
 
-try:
-    load_yaml = yaml.full_load
-except AttributeError:
-    load_yaml = yaml.load
+
+def decimal_constructor(loader, node):
+    value = loader.construct_scalar(node)
+    return decimal.Decimal(value)
+
+
+def date_constructor(loader, node):
+    value = loader.construct_scalar(node)
+    return datetime.date.fromisoformat(value)
+
 
 class TestImporters:
+    Loader = yaml.Loader
+    Loader.add_constructor('!decimal', decimal_constructor)
+    Loader.add_constructor('!date', date_constructor)
     with pathlib.Path(DATA_DIR, 'imports.yml').open() as yaml_file:
-        test_data = load_yaml(yaml_file)
+        test_data = yaml.load(yaml_file, Loader=Loader)
     for test in test_data:
         test['source'] = DATA_DIR / test['source']