Pythonic solution for conditional arguments passing

Question

I have a function with two optional parameters:

def func(a=0, b=10):
    return a+b

Somewhere else in my code I am doing some conditional a

Answer 1

to solve your specific question I would do:

args = {'a' : a, 'b' : b}
for varName, varVal in args.items():
    if not varVal:
        del args[varName]
f(**args)

But the most pythonic way would be to use None as the default value in your function:

f(a=None, b=None):
    a = 10 if a is None else a
    ...

and just call f(a, b)