CODEWITHSUNDEEP
pythonfunctionself
Mark Pistach
Mark Pistach

Reputation: 163

Python self function

I am modifying some Python code. In this code there is a class called Proxy which has a function "run" that is executed.

import flask
import gevent

class: Proxy
    def __init(self):
        ''' 
        *stuff*
        '''

        flask_app = Flask(__name__)

        self.run = lambda: (
            self.logger.critical('LISTENING %s%s' % (host, port)) or
            flask_app.run(host=host, port=port) 
        )

proxy = Proxy()
proxy.run()

I need to change the self.run = lambda: ('...') so that proxy.run() executes the following code:

http = WSGIServer(('', 8000), flask_app)
http.serve_forever()

How do I do this? I don't think I need a lambda expression and I should be using something else. How do I make proxy.run() execute the 2 lines of code from above? Assume I have all the proper dependencies imported and that the Proxy class functions as intended. Thanks in advance for your help.

I tried the following:

def run():
    http = WSGIServer(('', 8000), flask_app)
    http.serve_forever()

Then I tried proxy.run() and I get the error:

AttributeError: 'Proxy" object has no attribute 'run'

Upvotes: 0

Views: 424

Answers (2)

Samwise
Samwise

Reputation: 71522

Usually the way you define a function that's an attribute of an object is to make it a method:

class Proxy:
    def __init__(self, app: Flask):
        self._app = app

    def run(self) -> None:
        WSGIServer(('', 8000), self._app).serve_forever()

app = Flask(__name__)
proxy = Proxy(app)  # this calls the __init__ method defined above
proxy.run()         # and this calls the run method with "self" = "proxy"

Upvotes: 2

Mark Pistach
Mark Pistach

Reputation: 163

import flask
import gevent

class: Proxy
    def __init(self):
        ''' 
        *stuff*
        '''

        flask_app = Flask(__name__)
        http = WSGIServer(('', 8000), flask_app)

        self.run = lambda: (
            self.logger.critical('LISTENING %s%s' % (host, port)) or
            #flask_app.run(host=host, port=port) 
            http.serve_forever()
        )

proxy = Proxy()
proxy.run()

Thanks everyone for your contributions, they helped me figure it out.

Upvotes: 0

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