Python-Design-Patterns iterator
iterator Model
Python-Design-Patterns iterator
# file: 'iterator.py'
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/
Implementation of the iterator pattern with a generator
*TL;DR80
Traverses a container and accesses the container's elements.
"""
from __future__ import print_function
def count_to(count):
"""Counts by word numbers, up to a maximum of five"""
numbers = ["one", "two", "three", "four", "five"]
for number in numbers[:count]:
yield number
# Test the generator
count_to_two = lambda: count_to(2)
count_to_five = lambda: count_to(5)
print('Counting to two...')
for number in count_to_two():
print(number, end=' ')
print()
print('Counting to five...')
for number in count_to_five():
print(number, end=' ')
print()
### OUTPUT ###
# Counting to two...
# one two
# Counting to five...
# one two three four five
iterator.py
