Question

I am receiving the following error on a program:
TypeError: 'float' object is not iterable

This is the Code:

import lib601.sm as sm

def safeAdd (p1,p2):
if p1 == 'undefined':
if p2 == 'undefined':
return 0.0
else:
return p2
else:
if p2 == 'undefined':
return 0.0
else:
return p1 + p2

def safeMul (p1,p2):
if p1 == 'undefined':
if p2 == 'undefined':
return 1.0
else:
return p2
else:
if p2 == 'undefined':
return 1.0