Add compat module.

Author: domdfcoding

doc-source/api/compat.rst

@@ -0,0 +1,6 @@
+=================================
+:mod:`domdf_python_tools.compat`
+=================================
+
+.. automodule:: domdf_python_tools.compat
+	:no-members:

domdf_python_tools/compat.py

@@ -0,0 +1,45 @@
+#  !/usr/bin/env python
+#
+#  compat.py
+"""
+Cross-version compatibility helpers.
+
+.. versionadded :: 0.12.0
+
+Provides the following:
+
+.. py:data:: importlib_resources
+
+	`importlib_resources <https://importlib-resources.readthedocs.io/en/latest/>`_ on Python 3.6;
+	:mod:`importlib.resources` on Python 3.7 and later.
+"""
+#
+#  Copyright © 2020 Dominic Davis-Foster <[email protected]>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+#  MA 02110-1301, USA.
+#
+
+# stdlib
+import sys
+
+__all__ = ["importlib_resources"]
+
+if sys.version_info < (3, 7):
+	# 3rd party
+	import importlib_resources
+else:
+	# stdlib
+	import importlib.resources as importlib_resources

domdf_python_tools/words.py

@@ -40,11 +40,9 @@
 from string import ascii_lowercase, ascii_uppercase
 from typing import Any, Dict, Iterable, List, Optional
 
-# 3rd party
-import importlib_resources
-
 # this package
 import domdf_python_tools
+from domdf_python_tools.compat import importlib_resources
 
 __all__ = [
 		"greek_uppercase",

requirements.txt

@@ -1,5 +1,5 @@
 colorama>=0.4.3
 deprecation>=2.1.0
-importlib_resources>=3.0.0
+importlib_resources>=3.0.0; python_version < "3.7"
 pydash>=4.7.4
 typing_extensions>=3.7.4.3