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Re: Implement logic on object.attribute and object.attribute()

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On Mon, Nov 25, 2013 at 1:16 AM, Marc Aymerich <glicerinu@gmail.com> wrote:
> ...     def do_get(self):
> ...         # Do a HTTP GET request.
> ...         return "Get stuff"
> ...     def do_put(self):
> ...         # Do a HTTP PUT request.
> ...         return "Put stuff"

To make this a bit more realistic, try this instead - tying in with
what I said in response to Roy:

class CallableString(str):
    # Like a string, but callable.
    def function(self):
        raise NotImplementedError(
                "this must be overridden on the instance"
                )
    def __call__(self):
        return self.function()


class Magic_HTTP_Thing:
    @property
    def attribute(self):
        result = CallableString(self.do_get())
        result.function = lambda: self.do_put()
        return result
    def do_get(self):
        # Do a HTTP GET request.
        print("Doing the GET call, please wait...")
        time.sleep(1)
        return "Get stuff"
    def do_put(self):
        # Do a HTTP PUT request.
        print("Doing the PUT call, please wait...")
        time.sleep(1)
        return "Put stuff"

(PUT or POST, makes no difference; I think you were looking for POST,
but Steven wrote PUT here so I'll use that for simplicity)

>>> Magic_HTTP_Thing().attribute()
Doing the GET call, please wait...
Doing the PUT call, please wait...
'Put stuff'

And that's what you don't want happening. Your PUT / POST calls are
going to take twice as long as they should.

ChrisA

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Thread

Re: Implement logic on object.attribute and object.attribute() Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-11-24 05:04 -0800
  Re: Implement logic on object.attribute and object.attribute() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-24 13:45 +0000
    Re: Implement logic on object.attribute and object.attribute() Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-11-24 06:04 -0800
    Re: Implement logic on object.attribute and object.attribute() Chris Angelico <rosuav@gmail.com> - 2013-11-25 01:13 +1100
      Re: Implement logic on object.attribute and object.attribute() Roy Smith <roy@panix.com> - 2013-11-24 09:21 -0500
        Re: Implement logic on object.attribute and object.attribute() Chris Angelico <rosuav@gmail.com> - 2013-11-25 01:31 +1100
    Re: Implement logic on object.attribute and object.attribute() Chris Angelico <rosuav@gmail.com> - 2013-11-25 01:13 +1100
    Re: Implement logic on object.attribute and object.attribute() Marc Aymerich <glicerinu@gmail.com> - 2013-11-24 15:16 +0100
    Re: Implement logic on object.attribute and object.attribute() Chris Angelico <rosuav@gmail.com> - 2013-11-25 01:37 +1100
      Re: Implement logic on object.attribute and object.attribute() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-24 15:11 +0000
    Re: Implement logic on object.attribute and object.attribute() Marc Aymerich <glicerinu@gmail.com> - 2013-11-24 15:34 +0100
    Re: Implement logic on object.attribute and object.attribute() Marc Aymerich <glicerinu@gmail.com> - 2013-11-24 15:48 +0100
    Re: Implement logic on object.attribute and object.attribute() Chris Angelico <rosuav@gmail.com> - 2013-11-25 01:57 +1100

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