How can I pass optional or keyword parameters from one function to another? | Python

Collect the arguments using the * and ** specifier in the function's parameter list; this gives you the positional arguments as a tuple and the keyword arguments as a dictionary. You can then pass these arguments when calling another function by using * and **:
def f(x, *tup, **kwargs):
kwargs['width']='14.3c'
g(x, *tup, **kwargs)
In the unlikely case that you care about Python versions older than 2.0, use 'apply': def f(x, *tup, **kwargs):
kwargs['width']='14.3c'
apply(g, (x,)+tup, kwargs)