Windows上具有mod_wsgi的Python 3.6 Flask：没有名为queue的模块

Question

I was playing around with a Flask/Python RESTful api and all was well until I started trying to learn how to serve it. Of course I tried this out locally.

I installed AMPPS since it comes with python and mod_wsgi installed and enabled by default. I went through all of the setups and I was able to get the default "Hello World!" application to work. Huzzah! Right?

Then I tried to start bringing in my app and this is where I've hit the road blocks.

At first, I was getting an error that there was no module named flask. After some reading I learned that I need to load my virtualenv like so:

activate_this = 'path/to/venv/Scripts/activate_this.py'
with open(activate_this) as file_:
    exec(file_.read(), dict(__file__=activate_this))

This seemed to work with flask, but then I got:

ModuleNotFoundError: No module named 'queue'

I've scoured the interwebs and have read about "queue" vs "Queue" but I'm not importing it directly.

Here is the code that I have currently.

activate_this = 'path/to/venv/Scripts/activate_this.py'
with open(activate_this) as file_:
    exec(file_.read(), dict(__file__=activate_this))

# this line is what causes the error
from flask import Flask

def application(environ, start_response):
    status = '200 OK'
    output = b'Hello World!'
    response_headers = [('Content-type', 'text/plain'),('Content-Length', str(len(output)))]
    start_response(status, response_headers)
    return [output]

Any help would be appreciated.

Answer 1

Your mod_wsgi is actually compiled for Python 2.7, not 3.6. The error is because the Queue module got renamed to queue in 3.6, so when import queue under 2.7 it will fail.

You will need to uninstall mod_wsgi and install a version of if that is compiled for Python 3.6. You cannot force a version of mod_wsgi compiled for one Python version to run as a different version by pointing it at a Python virtual environment of a different version. This is because mod_wsgi is linked direct to the Python library of a specific version.