Question

Possible Duplicate:
How to get the original variable name of variable passed to a function

Is there something like below in python where based on the name of the parameter passed to a function we can execute conditional statements like below.

def func(a,b,c,d)

if fourth paramter = d:
#code

elif fourth parameter = e:
#code

else:

#code

   def main():
         func(a,b,c,d)
         func(a,b,c,e)

Answer 1

You should use keyword arguments:

def func(a, b, c, **kwargs):
    if 'd' in kwargs:
        ....
    elif 'c' in kwargs:
        ....

This is not exactly equivalent to what you want, though. If you want to ensure that d or e is the fourth parameter, that would be more troublesome.

Then you could try something like:

def func(a, b, c, d=None, e=None):
    if d is not None and e is None:
        ....
    elif e is not None and d is None:
        ....

Note that this is not exactly what you’re asking. It will not access the “original” name of the variable passed to the function as a positional argument, as in the question linked by Stuart. You shouldn’t even try to do that, it’s pointless.