Version 0.4.0: Allow installation (but not usage) with Python 2.7

Author: simonrob

README.md

@@ -15,8 +15,8 @@ Install using `pip`:
 python -m pip install pyoslog
 ```
 
-The module will install and import without error on earlier macOS versions.
-Use `pyoslog.is_supported()` if you need to support old macOS versions and want to know at runtime whether to use pyoslog.
+The module will install and import without error on earlier macOS versions (and on unsupported Operating Systems and Python versions).
+Use `pyoslog.is_supported()` if you need to support old macOS versions or other environments and want to know at runtime whether to use pyoslog.
 Please note that if `is_supported()` returns `False` then none of the module's other methods or constants will exist.
 
 
@@ -92,4 +92,4 @@ A `log.h` binding is on that project's [roadmap](https://github.com/ronaldoussor
 
 
 ## License
-[Apache 2.0](LICENSE)
+[Apache 2.0](https://github.com/simonrob/pyoslog/blob/main/LICENSE)

pyoslog/__version__.py

@@ -1,5 +1,5 @@
 __title__ = 'pyoslog'
-__version__ = '0.3.0'
+__version__ = '0.4.0'
 __description__ = 'Send messages to the macOS unified logging system'
 __author__ = 'Simon Robinson'
 __author_email__ = '[email protected]'

pyoslog/compatibility.py

@@ -6,4 +6,5 @@ def is_supported():
     """Unified logging is only present in macOS 10.12 and later, but it is nicer to not have to check OS type or version
     strings when installing or importing the module - use this method at runtime to check whether it is supported. It is
     important to note that if is_supported() is False then none of the module's other methods/constants will exist."""
-    return sys.platform == 'darwin' and float('.'.join(platform.mac_ver()[0].split('.')[:2])) >= 10.12
+    return sys.platform == 'darwin' and sys.version_info >= (3, 0,) and float(
+        '.'.join(platform.mac_ver()[0].split('.')[:2])) >= 10.12

setup.py

@@ -1,4 +1,3 @@
-import importlib.util
 import os
 
 from setuptools import setup, Extension
@@ -13,12 +12,22 @@
 with open('README.md') as readme_file:
     readme = readme_file.read()
 
-# see compatibility.py - allow installation on older versions but provide is_supported() at runtime
-spec = importlib.util.spec_from_file_location('compatibility', os.path.join(working_directory, 'compatibility.py'))
-compatibility = importlib.util.module_from_spec(spec)
-spec.loader.exec_module(compatibility)
+# see compatibility.py - allow installation on older versions (or other OSs) but provide is_supported() at runtime
+compatibility_module_name = 'compatibility'
+compatibility_module_path = os.path.join(working_directory, '%s.py' % compatibility_module_name)
+try:
+    # noinspection PyUnresolvedReferences
+    import importlib.util
+
+    spec = importlib.util.spec_from_file_location(compatibility_module_name, compatibility_module_path)
+    compatibility = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(compatibility)
+except ImportError:
+    import imp
+
+    compatibility = imp.load_source(compatibility_module_name, compatibility_module_path)
+
 ext_modules = []
-# noinspection PyUnresolvedReferences
 if compatibility.is_supported():
     ext_modules.append(Extension('_' + NAME, ['%s/_%s.c' % (NAME, NAME)]))