Wrap Callback Function To Include Extra Argument When Caller Verifies Exact Callback Signature

I'm trying to bind multiple callback functions across multiple properties with code that looks something like: for key in keys: def callback(self, value): #Do stuff...

Solution 1:

I would create a callback generator that takes your parameters (such as key) and creates your callbacks.

>>>defcallback_generator(key):...defcallback(self, value):...        do_something_with(key, value)...return callback...>>>for key in keys:...    doSomething(callback_generator(key))...

Solution 2:

Minutes after I figured out that I can create a function inside the for loop to get a new stack frame. This unfortunately does not seem at all Pythonic...

forkeyin keys:
    def dummyForStackFrame(key): #Extra functiontoget a new stack frame withkey
        def wrappedCallback(self, value):
            realCallback(self, key, value)
            return None
        doSomething(wrappedCallback
    dummyForStackFrame(key)