CheckIO - Electronic Station Challenge 2 : Restricted sum

checkio.3.02.restrictedSum.py

# CheckIO - Electronic Station Challenge 2 : Brackets
# http://checkio.org

# Our new calculator is censored and as such it does not accept certain words. 
# You should try to trick by writing a program to calculate the sum of numbers.
# Given a list of numbers, you should find the sum of these numbers. 
# Your solution should not contain any of the banned words, even as a part of another word.
# The list of banned words are as follows:
# sum
# import
# for
# while
# reduce
# Input: A list of numbers.
# Output: The sum of numbers.
# Precondition: The small amount of data. Let's creativity win!

def checkio(data):
    if len(data)==0: return 0
    return data[0]+checkio(data[1:])