uwsgi找不到Flask应用程序：（未找到可调用的对象或导入错误）

Question

I am roughly following this deployment guide for Flask. When I launch my app through uwsgi, I receive the error:

*** Operational MODE: preforking ***

unable to load app 0 (mountpoint='') (callable not found or import error)

*** no app loaded. going in full dynamic mode ***

It is the same issue as this other SO question , so it is a python path problem, but I still can't get my app to run. Here is my setup:

/home/btw/prod/
.... app.py
.... inits.py
.... templates/
.... wsgi.py
.... prod.ini
.... env/       <--- virtualenv dir

inits.py

# This initializes everything

from flask import Flask
#... other imports

app = Flask(__name__)
app.debug = False

# Flask-Migrate
migrate = Migrate(app,db)
manager = Manager(app)
manager.add_command('db', MigrateCommand)

app.py

# This holds the main application code and routes 

from inits import *

@app.route('/doit')
def doit():
    return render_template('doit.html')

if __name__ == '__main__':
    manager.run()

prod.ini

[uwsgi]
module = wsgi

master = true
processes = 5

socket = prod.sock
chmod-socket = 660
vacuum = true

die-on-term = true

prod.conf (used to start the flask app):

description "uWSGI server instance configured to serve prod"

start on runlevel [2345]
stop on runlevel [!2345]

setuid btw
setgid www-data

env PATH=/home/btw/prod/env/bin
chdir /home/btw/prod
exec uwsgi --ini prod.ini

wsgi.py

from app import manager

if __name__ == '__main__':
    manager.run()

I also tried doing:

from prod import app

if __name__ == '__main__':
    manager.run()

But this complains about ImportError: No module named prod .

Can someone help me out with why uwsgi can't find my application?

EDIT :

I think I found the problem, but I dont know what the solution is. Calling manager.run() causes the application to not be found, but if I just use app.run() instead, bypassing Flask's manager, uwsgi successfully locates the application.

Why is that?

Answer 1

Okay, so after a few hours of exploring this mess, I figured it out!

When running uwsgi, app must be conflicting with some other internal module. I've changed my initialization to be application = Flask(__name__) and did from app import application . Now my application is being loaded correctly.