WSGIServer TypeError：__call __（）接受3个位置参数，但给出了4个

Question

我正在使用Flask和Python 3.7。 我已经实现了一个像这样的hello world应用程序：

from wsgiref.simple_server import WSGIServer

from flask import request, json

from base.flask_instance import FlaskInstance

app = FlaskInstance.get_instance()


@app.route('/hello', methods=['GET'])
def _signup():
    try:
        return "hello world"
    except BaseException as e:
        print(e)


if __name__ == '__main__':
    # for using in development server.
    app.run(debug=True, host='0.0.0.0', port=5000)
    # for using in production server.
    http_server = WSGIServer(server_address=('', 5000), RequestHandlerClass=app)
    http_server.serve_forever()

当我使用此代码段运行它时，它工作正常：

app.run(debug=True, host='0.0.0.0', port=5000)

但是此代码段适用于开发服务器，因此不应在生产部署中使用。因此，我正在使用此代码段运行应用程序：

http_server = WSGIServer(server_address=('', 5000), RequestHandlerClass=app)
http_server.serve_forever()

此代码段也运行良好，但是在调用post请求后，它将引发此异常：

Exception happened during processing of request from ('192.168.1.13', 1978)
Traceback (most recent call last):
  File "C:\Users\milad\AppData\Local\Programs\Python\Python37\lib\socketserver.py", line 316, in _handle_request_noblock
    self.process_request(request, client_address)
  File "C:\Users\milad\AppData\Local\Programs\Python\Python37\lib\socketserver.py", line 347, in process_request
    self.finish_request(request, client_address)
  File "C:\Users\milad\AppData\Local\Programs\Python\Python37\lib\socketserver.py", line 360, in finish_request
    self.RequestHandlerClass(request, client_address, self)
TypeError: __call__() takes 3 positional arguments but 4 were given

如果我通过Python 2.7运行此应用程序，它将运行得像个魅力！ 我应该怎么做才能用Python 3.7运行它？

Answer 1

# from wsgiref.simple_server import WSGIServer
from gevent.pywsgi import WSGIServer
from flask import request, json, Flask

# from base.flask_instance import FlaskInstance
#
# app = FlaskInstance.get_instance()

app = Flask(__name__)


@app.route('/hello', methods=['GET'])
def _signup():
    try:
        return "hello world"
    except BaseException as e:
        print(e)


if __name__ == '__main__':
    # for using in development server.
    # app.run(debug=True, host='0.0.0.0', port=5000)
    # for using in production server.
    http_server = WSGIServer(('', 5000), app)
    http_server.serve_forever()

您应该从“ gevent.pywsgi”导入“ WSGIServer”，并且WSGIServer（）的输入类型已更改