The Google Cloud Storage client library is a client-side library that is not dependent on any specific version of App Engine for production use. If you want to test your code using the App Engine development server, you must use the development server from the App Engine SDK 1.8.1 or greater.
Downloading the Google Cloud Storage Client Library
The download varies slightly depending on whether you want to acquire the package from PyPi or use git. Select from the following:
PyPi
PyPi users can install the library as follows:
pip install GoogleAppEngineCloudStorageClient -t <your_app_directory/lib>
Git Clone
To check out the source over HTTP:
git clone https://github.com/GoogleCloudPlatform/appengine-gcs-client.git gcs-client