util: Move module loader functions to a new dynload module.

CODE.rst

@@ -73,7 +73,7 @@ import2ledger finds importers by looking at all ``.py`` files in the ``importers
 
 Hooks follow the same pattern, searching the ``hooks/`` directory and looking for things named ``*Hook``.
 
-Technically this is done by ``importers.load_all()`` and ``hooks.load_all()`` functions, but most of the code to do this is in the ``util`` module.
+Technically this is done by ``importers.load_all()`` and ``hooks.load_all()`` functions, but most of the code to do this is in the ``dynload`` module.
 
 Main loop
 ---------

import2ledger/dynload.py

@@ -0,0 +1,30 @@
+import importlib
+import logging
+import pathlib
+
+logger = logging.getLogger('import2ledger')
+
+def load_modules(src_dir_path):
+    rel_path = src_dir_path.relative_to(pathlib.Path(__file__).parent)
+    import_prefix = 'import2ledger.{}.'.format('.'.join(rel_path.parts))
+    for py_path in src_dir_path.glob('*.py'):
+        mod_name = py_path.name[:-3]
+        if mod_name.startswith(('.', '_')):
+            continue
+        try:
+            module = importlib.import_module(import_prefix + mod_name)
+        except ImportError as error:
+            logger.info("failed to import %s: %s", py_path, error,
+                        exc_info=logger.isEnabledFor(logging.DEBUG))
+        else:
+            yield module
+
+def module_contents(module):
+    for name in dir(module):
+        yield name, getattr(module, name)
+
+def submodule_items_named(file_path, name_test):
+    for module in load_modules(pathlib.Path(file_path).parent):
+        for name, item in module_contents(module):
+            if name_test(name):
+                yield item

import2ledger/hooks/__init__.py

@@ -1,6 +1,6 @@
 import operator
 
-from .. import util
+from .. import dynload
 
 def load_all():
-    return util.submodule_items_named(__file__, operator.methodcaller('endswith', 'Hook'))
+    return dynload.submodule_items_named(__file__, operator.methodcaller('endswith', 'Hook'))

import2ledger/importers/__init__.py

@@ -1,6 +1,6 @@
 import operator
 
-from .. import util
+from .. import dynload
 
 def load_all():
-    return util.submodule_items_named(__file__, operator.methodcaller('endswith', 'Importer'))
+    return dynload.submodule_items_named(__file__, operator.methodcaller('endswith', 'Importer'))

import2ledger/util.py

@@ -1,34 +1,4 @@
 import datetime
-import importlib
-import logging
-import pathlib
-
-logger = logging.getLogger('import2ledger')
-
-def load_modules(src_dir_path):
-    rel_path = src_dir_path.relative_to(pathlib.Path(__file__).parent)
-    import_prefix = 'import2ledger.{}.'.format('.'.join(rel_path.parts))
-    for py_path in src_dir_path.glob('*.py'):
-        mod_name = py_path.name[:-3]
-        if mod_name.startswith(('.', '_')):
-            continue
-        try:
-            module = importlib.import_module(import_prefix + mod_name)
-        except ImportError as error:
-            logger.info("failed to import %s: %s", py_path, error,
-                        exc_info=logger.isEnabledFor(logging.DEBUG))
-        else:
-            yield module
-
-def module_contents(module):
-    for name in dir(module):
-        yield name, getattr(module, name)
-
-def submodule_items_named(file_path, name_test):
-    for module in load_modules(pathlib.Path(file_path).parent):
-        for name, item in module_contents(module):
-            if name_test(name):
-                yield item
 
 def strpdate(date_s, date_fmt):
     return datetime.datetime.strptime(date_s, date_fmt).date()