flask run方法和run_simple
1.Flask提供的Web服务器不适合在生产环境中使用
2.run方法启动flask集成的服务器:
例:
if __name__ == '__main__':
app.run(debug=True)
3.源码:
def run(self, host='localhost', port=5000, **options):
"""Runs the application on a local development server. If the
:attr:`debug` flag is set the server will automatically reload
for code changes and show a debugger in case an exception happened.
:param host: the hostname to listen on. set this to ``'0.0.0.0'``
to have the server available externally as well.
:param port: the port of the webserver
:param options: the options to be forwarded to the underlying
Werkzeug server. See :func:`werkzeug.run_simple`
for more information.
"""
from werkzeug import run_simple
if 'debug' in options:
self.debug = options.pop('debug')
options.setdefault('use_reloader', self.debug)
options.setdefault('use_debugger', self.debug)
return run_simple(host, port, self, **options)
从源码中可以看出,Flask集成的run方法是由werkzeug中的run_simple方法提供的。run()接受debug参数时,options.pop('debug')
,设定’use_reloader’默认参数为self.debug,’use_debugger’为self.debug.
4.总结
依赖werkzeug