Linter and misc cleanup

:ci skip dl

devscripts/update-version-workflow.py

@@ -0,0 +1,30 @@
+from __future__ import unicode_literals
+from datetime import datetime
+# import urllib.request
+
+# response = urllib.request.urlopen('https://blackjack4494.github.io/youtube-dlc/update/LATEST_VERSION')
+# _LATEST_VERSION = response.read().decode('utf-8')
+
+exec(compile(open('youtube_dlc/version.py').read(), 'youtube_dlc/version.py', 'exec'))
+_LATEST_VERSION = locals()['__version__']
+
+_OLD_VERSION = _LATEST_VERSION.replace('-', '.').split(".", 4)
+
+old_ver = '.'.join(_OLD_VERSION[:3])
+old_rev = _OLD_VERSION[3] if len(_OLD_VERSION) > 3 else ''
+
+ver = datetime.now().strftime("%Y.%m.%d")
+rev = str(int(old_rev or 0) + 1) if old_ver == ver else ''
+
+version = '.'.join((ver, rev)) if rev else ver
+
+print('::set-output name=ytdlc_version::' + version)
+
+file_version_py = open('youtube_dlc/version.py', 'rt')
+data = file_version_py.read()
+data = data.replace(_LATEST_VERSION, version)
+file_version_py.close()
+
+file_version_py = open('youtube_dlc/version.py', 'wt')
+file_version_py.write(data)
+file_version_py.close()