11.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from __future__ import print_function, unicode_literals

import os, os.path
import re
import sys

from pprint import pprint, pformat

import random
import time

size = 5000000
st = time.time()
a = [random.randint(1, size) for _ in xrange(size)]
print("Random list init", time.time() - st)

st = time.time()
a = [i for i in range(size)]
print("Range list init", time.time() - st)

# Results for Py2:
# Random list init 8.04576992989
# Range list init 0.624060153961