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'''
Infix calculator
First tokenize infix expression,
then transform it into postfix,
then calculate it.
E.g.:
9 - 5 + 2 * 3
=> 9 5 - 2 3 * +
'''
import re

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import sys
from urllib import urlencode
import requests
from urlparse import urlparse, parse_qs
from random import choice
import re


self_id = None # your facebook id here
utc_bday = None # utc timestamp of your birthday

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Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

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import os, filecmp

codes = {200:'success',404:'file not found',400:'error',408:'timeout'}

def compile(file,lang):
    if lang == 'java':
        class_file = file[:-4]+"class"
    elif lang == 'c':
        class_file = file[:-2]
    elif lang=='cpp':

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#Web scrapers on the internet

See this repo to contribute/see more: https://github.com/cassidoo/scrapers

• https://www.crummy.com/software/BeautifulSoup/
• http://crawly.diffbot.com/
• http://scrapinghub.com
• http://www.outwit.com/products/hub/
• http://webroots.io
• http://clearbit.com

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from HTMLParser import HTMLParser
import urllib2
import os
import re


re_url = re.compile(r'^(([a-zA-Z_-]+)://([^/]+))(/.*)?$')

def resolve_link(link, url):
    m = re_url.match(link)

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# Redis Cheatsheet
# All the commands you need to know


redis-server /path/redis.conf  # start redis with the related configuration file
redis-cli                      # opens a redis prompt


# Strings.