ec_itertools.py

# modified from: http://jmduke.com/posts/a-gentle-introduction-to-itertools/

import itertools

letters = ['a', 'b', 'c', 'd', 'e', 'f']
booleans = [1, 0, 1, 0, 0, 1]
numbers = [23, 20, 44, 32, 7, 12]
decimals = [0.1, 0.7, 0.4, 0.4, 0.5]

print("before cast to a list:     " + str(itertools.chain(letters, booleans, decimals)))
print("after cast to a list :     " + str(list(itertools.chain(letters, booleans, decimals))))


# =============================== OUTPUT =================================================
# before cast to a list:     <itertools.chain object at 0x7f30b9ee4e48>
# after cast to a list :     ['a', 'b', 'c', 'd', 'e', 'f', 1, 0, 1, 0, 0, 1, 0.1, 0.7, 0.4, 0.4, 0.5]