Pythonic solution for conditional arguments passing

If you don’t want to change anything in func then the sensible option would be passing a dict of arguments to the function:

>>> def func(a=0,b=10):
...  return a+b
...
>>> args = {'a':15,'b':15}
>>> func(**args)
30
>>> args={'a':15}
>>> func(**args)
25
>>> args={'b':6}
>>> func(**args)
6
>>> args = {}
>>> func(**args)
10

or just:

>>>func(**{'a':7})
17