How to set keyword arguments values as other keyword arguments?

Question

Is there a (clean, easy) way to set keyword args as other keyword args in a parameters list? Something like this:

class Foo():
    def __init__(self, kwarg1='a', kwarg2=kwarg1, kwarg3=kwarg1):

I basically need all three to have the same default value without hard coding it in. That way if the user wants to edit kwarg1to be something else, the default of kwarg2 and kwarg3 will default to the new value as well; but will still allow the functionality of customizing kwarg2 and kwarg3 if desired.

I imagine I can do something like this:

class Foo():
    def __init__(self, kwarg1='a', kwarg2='', kwarg3=''):
        if kwarg2 == '':
            self.kwarg2 = kwarg1

        if kwarg3 == '':
            self.kwarg3 = kwarg1

It's just kind of ugly. I know this is an odd question. Just kinda curious if there is a cleaner way to accomplish this.

Answer 1

Try this, Setting value None to kwarg1 and kwarg2 might help you.:

class Foo:
    def __init__(self,kwarg1='a',kwarg2=None,kwarg3=None):
        self.kwarg1 = kwarg1
        self.kwarg2 = kwarg2 if kwarg2 != None else self.kwarg2 = kwarg1
        self.kwarg3 = kwarg3 if kwarg3 != None else self.kwarg3 = kwarg1