Python and Libraries Cheatsheet

Sum

sum(<list>)

Profile

import pycallgraph
graph = pycallgraph.output.GraphvizOutput()
graph.output_file = <filename>
whith pycallgraph.PyCallGraph(output=graph):
    <code>

SQLite

import sqlite3
db = sqlite3.connect(<filename>)

Read

cursor = db.execute(<query>)
if cursor:
    cursor.<fetchone/fetchall>()
db.close()

Write

db.execute(<query>)
db.commit()

Curses

import curses
def main():
    curses.wrapper(draw)
def draw(screen):
    screen.clear()
    screen.addstr(0, 0, "Press ESC to quit.")
    while screen.getch() != 27:
        pass

Regex

import re
re.sub(<regex>, <new>, <text>)
re.search(<regex>, <text>)

Threading

import threading

Thread

thread = threading.Thread(target=<function>, args=(<first arg>, ))
thread.start()
thread.join()

Lock

lock = threading.Rlock()
lock.acquire()
lock.release()

Bottle

import bottle

Run

bottle.run(host='localhost', port=8080)
bottle.run(host='0.0.0.0', port=80, server='cherypy')

Static request

Dynamic request

REST request

Type