Error loading Google App Engine application

Question

Error loading Google App Engine application

I use the usual command to upload my application to the Google App Engine (Python 2.7, SDK 1.8.9):

appcfg.py --oauth2 update .

But after refactoring in my project, there is a regex error for app.yaml ( here is the code )

Mistake:

02:00 AM Application: sandengine; version: dev
02:00 AM Host: appengine.google.com
02:00 AM Starting update of app: sandengine, version: dev
02:00 AM Getting current resource limits.
02:00 AM Scanning files on local disk.
Traceback (most recent call last):
  File "/usr/local/bin/appcfg.py", line 199, in <module>
    run_file(__file__, globals())
  File "/usr/local/bin/appcfg.py", line 195, in run_file
    execfile(script_path, globals_)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 4933, in <module>
main(sys.argv)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 4924, in main
result = AppCfgApp(argv).Run()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 2648, in Run
self.action(self)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 4604, in __call__
return method()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 3419, in Update
self._UpdateWithParsedAppYaml(appyaml, self.basepath)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 3466, in _UpdateWithParsedAppYaml
self.UpdateVersion(rpcserver, basepath, appyaml, APP_YAML_FILENAME)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 3357, in UpdateVersion
return appversion.DoUpload(paths, openfunc)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 2143, in DoUpload
self._AddFilesThatAreSmallEnough(paths, openfunc)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 2211, in _AddFilesThatAreSmallEnough
file_classification = FileClassification(self.config, path)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 257, in __init__
self.__static_mime_type = self.__GetMimeTypeIfStaticFile(config, filename)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/appcfg.py", line 287, in __GetMimeTypeIfStaticFile
if re.match(regex, filename):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.py", line 137, in match
return _compile(pattern, flags).match(string)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.py", line 242, in _compile
raise error, v # invalid expression
sre_constants.error: bogus escape: '\\1'