gchiam

$ python -c "print('True' if None < 0 else False)"
True

$ python3 -c "print('True' if None < 0 else False)"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
TypeError: unorderable types: NoneType() &lt; int()

gchiam

a = [1, 2, 3]
b = [4, 5, 6]

zipped = zip(a,b)
# zipped = [(1, 4), (2, 5), (3, 6)]

unzipped = zip(*zippped)
# unzipped = [(1, 2, 3), (4, 5, 6)]

# get back a, b

gchiam

"""Sequence generator


$ python sequence.py 3
[3]
[2, 1]
[1, 1, 1]

$python sequence.py 6
[6]

gchiam

"""Copied from http://hunterford.me/django-custom-model-manager-chaining/
Reference: http://www.dabapps.com/blog/higher-level-query-api-django-orm/

usage: 
    Post.objects.published()
    Post.objects.by_author(user=request.user).published()
"""
from django.db import models

gchiam

"""Print Fibonacci series using generator"""

import argparse
import textwrap


def fibonacci(number):
    """Fibonacci series generator"""
    previous, current = 0, 1
    counter = 0