A set of standard command line arguments for Flask applications.
Here is how the Runner object is initialized and used:
from flask import Flask
from flask.ext.runner import Runner
app = Flask(__name__)
runner = Runner(app)
@app.route('/')
def hello_world():
return 'Hello World!'
if __name__ == '__main__':
runner.run()
This application now has command line options that expose many of the configuration options that can be sent as arguments to app.run():
$ python hello.py --help
usage: hello.py [-h] [--host HOST] [--port PORT] [--debug] [--noeval]
[--reload] [--extra FILE]
optional arguments:
-h, --help show this help message and exit
--host HOST hostname or IP address to listen on (default is 127.0.0.1)
--port PORT port of the web server (default is 5000)
--debug enable the debugger
--noeval disable the exception evaluation feature in the debugger
--reload reload the Python process when any modules are changed
--extra FILE additional file for the reloader to watch for changes
These are some example ways in which the application can be invoked:
$ python hello.py
Start server with all defaults (listen on http://127.0.0.1:5000, no debugger, no reloader).
$ python hello.py --host 0.0.0.0
Listen on all public IPs.
$ python hello.py --port 8080
Listen on port 8080.
$ python hello.py --debug
Enable the interactive debugger.
$ python hello.py --debug --noeval
Enable the interactive debugger, but disable evaluation of expressions on the browser.
$ python hello.py --debug --reload
Enable the interactive debugger and the reloader.
$ python hello.py --reload --extra config.txt --extra babel.cfg
Enable the interactive reloader and make it watch config.txt and babel.cfg in addition to the application source files.