Error uploading Google App Engine Application

I am using a normal command to upload my application in Google App Engine (Python 2.7, SDK 1.8.9): ``` appcfg.py --oauth2 update . ``` But after a refactoring in my project there is an error in a regular expression for app.yaml (here is the code) The error is: ``` 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' ```