[Python] How can I print the result of a function in Python? [duplicate]

This is my Python code which, when I run, lacks any printed number.

def fib(a):
while a - 2 > 0:
def fib(a):
fib(a - 1) + fib(a - 2)
if a == 1: # Lines 5 to 10 are intended
def fib(a): # to act as a scaffolding
fib(a) == 1 # for the fib(a) function.
if a == 2:
def fib(a):
fib(a) == 1
print(fib(a)) # This is the failing line.

fib(3)

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