#!/usr/bin/env python

"""

hand writing 'for'

demonstrates how for interacts with an iterable

"""

l = [1,2,3,4,5,]

def my_for(an_iterable, func):

"""

Emulation of a for loop.

func() will be called with each item in an_iterable

:param an_iterable: anything that satisfies the interation protocol

:param func: a callable -- it will be called, passing in each item

in an_iterable.

"""

# equiv of "for i in l:"

iterator = iter(an_iterable)

while True:

try:

i = next(iterator)

except StopIteration:

break

func(i)

if __name__ == "__main__":

def print_func(x):

print(x)

l = [1,2,3,4,5,]

my_for(l, print_func)

t = ('a','b','c','d')

my_for(t, print_func)