i am in an intro to programming class and we are learning the lanuage python: def is_prefix(s1,s2): """ s1:str s2:str return:bool - True if and only if s1 is a prefix of s2 """ #Do this with a loop....

i am in an intro to programming class and we are learning the lanuage python:

def is_prefix(s1,s2):
"""
s1:str
s2:str
return:bool - True if and only if s1 is a prefix of s2
"""
#Do this with a loop.
#return s1 == s2[:len(s1)] will work, but is not allowed.