Google App Engine，既不支持urllib3也不支持请求？

Question

I keep getting the following error when I deploy my google app:

ERROR: (gcloud.app.deploy) An error occurred while parsing file: [/Users/app.yaml]the library "requests" is not supported

I have changed it to urllib3, but still get the same error. Following is the app.yaml:

# entrypoint: main.py
# env: flex
# runtime: python

runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /static
  static_dir: static
- url: /.*
  script: main.app

libraries:
  - name: ssl
    version: latest
  - name: lxml
    version: latest
  - name: urllib3
    version: latest
  - name: flask
    version: latest

And the invocation of the library:

# from requests import get as rget 
from urllib3 import PoolManager
http = PoolManager()
query = some_query
# page = rget(query)
page = http.request('GET',query)

I can't seem to figure out what the issue could be. I have seen previous stack overflow answers which ask me to pip install in the lib, and add it to requirement.txt too, but none of these seem to make a difference.

Is there any other library that does exactly the same but is natively supported by google app engine ?

Answer 1

App Engine supports third party libraries in two ways in the standard Python 2.7 environment.

• Built-in libraries : these are automatically enabled in the cloud if declared in your app.yaml file. You may need to install them locally with pip to make them available in the dev server .
• Other third party libraries: these libraries must be pip installed into a folder in your application and uploaded as part of your deployment. The folder must be declared in your appengine_config.py . These libraries must not be declared in app.yaml , or you get the error you're reporting.

requests and urllib3 are not included in the built-in libraries so you will need to:

1. Set up vendored libraries folder in appengine_config.py
2. pip install -t <your-lib-folder> requests ( urllib3 is installed as part of requests I believe).
3. Ensure <your-lib-folder> is uploaded when you deploy to the cloud.