ImportError: No module named flask_restful

Question

I am trying to deploy appengine flex python app but getting the following in Stackdriver log stderr after deployment

  File "/env/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 578, in spawn_worker
    worker.init_process()
  File "/env/local/lib/python2.7/site-packages/gunicorn/workers/base.py", line 126, in init_process
    self.load_wsgi()
  File "/env/local/lib/python2.7/site-packages/gunicorn/workers/base.py", line 135, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/env/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/env/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 65, in load
    return self.load_wsgiapp()
  File "/env/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/env/local/lib/python2.7/site-packages/gunicorn/util.py", line 352, in import_app
    __import__(module)
  File "/home/vmagent/app/my_service/entry_point.py", line 5, in <module>
    import flask_restful as restful
ImportError: No module named flask_restful

entry_point.py in line 5 has

import flask_restful as restful

And my requirement.txt has

Flask-RESTful==0.3.6
gunicorn==19.7.1

Not sure why its still complaining about Flask-Restful

Groningen

Apparently imports can be case sensitive, maybe check that out? Flask-RESTful in your requirements isn't all lowercase like most packages I've seen... – Heath

that was the problem. Not sure why it works when we use pip from command line. – Groningen

Since that was the solution to the problem, may, @Sagasaki, post the good answer not as a comment but as an answer in order SoulMan be able to accept it and thus so help other SO users? – Mcgowen

Answer 1

Imports are case sensitive on certain platforms, namely Linux (Windows and Mac may or may not care about case). The package Flask-RESTful isn't all lowercase like most packages (as per PEP 8 recommendation), so import flask_restful as restful will yield an import error unless the proper case is used.

Heath

Answer 2

ImportError: No module named flask_restful

Seems that you don't have flask_restful installed, to install run:

pip install flask-restful

in your Terminal and then run your app.

Documentation: https://flask-restful.readthedocs.io/en/latest/installation.html

Maurilla

Might also be pip3 install flask-restful – Candiot

Answer 3

I had the same problem... I was running my app using the "Play" button of Visual Studio Code and was stuck. Everything was already installed... After a while I realized that I had to use the console of the IDE and start the program from there:

python App.py

I was running it under a Virtual Environment

Seismograph

Answer 4

1. basically your project root directory is not matching with your python root directory for this specific (flask_restful) package,,

2. uninstall python application and reinstall it on window programs files, you should install python in your window programs not separately

   i resolved it by this procedure (happy coding)

Outlast