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Passing arguments to URL object

Using the URL object in kivy, https://kivy.org/doc/stable/api-kivy.network.urlrequest.html, if I wanted to change the on_success function to take in another parameter, how would I pass the value to it?

def generate_images(sensor_id):
    req = UrlRequest(URL, on_success=url_success)

And then in the on_success having something like this

def url_success(req, result, sensor_id):
Solution

  • One solution is to use functools.partial():

    from functools import partial

# ...

def generate_images(sensor_id):
    req = UrlRequest(URL, on_success=partial(url_success, sensor_id))

# ...

def url_success(sensor_id, req, result):
    print(sensor_id, req, result)

    Another solution is to use a lambda functions:

    def generate_images(sensor_id):
    req = UrlRequest(URL, on_success= lambda req, result, sensor_id=sensor_id : url_success(req, result, sensor_id))