How to call multiple function usinf if statement in python?

I want to do the following program in python :

def f1():
    a=1
    return a
def f2():
    a=2
    return a
r=raw_input("Enter no of functions you want :")
    if r=1:
    v1=f1() or v2=f2()
elif r=2:
    v1=f1()
    v2=f2()

How can I do this please help.