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def randint(*args): return 10
  guess = 10

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ssh-keygen -f ~/.ssh/id_rsa -t rsa -N ''
cat ~/.ssh/id_rsa.pub

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after="http://mirrors.ustc.edu.cn/ubuntu/"
origin_src="http://us.archive.ubuntu.com/ubuntu/"
origin_scr="http://security.ubuntu.com/ubuntu"
sudo sed -i "s;$origin_src;$after;g" /etc/apt/sources.list 
sudo sed -i "s;$origin_scr;$after;g" /etc/apt/sources.list
sudo apt-get update

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defaults write com.apple.dock ResetLaunchPad -bool true;killall Dock

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'''
digital_root(16)
=> 1 + 6
=> 7

digital_root(942)
=> 9 + 4 + 2
=> 15 ...
=> 1 + 5
=> 6

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def whatCentury(year):
    # code must go here
    digit_year = int(year)
    digit_century = (digit_year-1)/100 + 1
    a = {1:'st',2:'nd',3:'rd'}
    if digit_century < 11 or digit_century > 20:
        return str(digit_century)+a.get(digit_century % 10,'th')
    return str(digit_century)+'th'

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# -*- coding: utf-8 -*-

import smtplib

def send_email_over_smtp(to_email,email_content,login_user='no-reply@genscript.com',email_cc=None):
    try:
        smtpserver = smtplib.SMTP('10.168.2.119',timeout=60)
        smtpserver.ehlo()
        if email_cc:
            header = 'To:' + to_email + '\n' +'CC:'+email_cc +'\n' + 'From: ' + login_user + '\n' + 'Subject:CR Notification\n'

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# -*- coding: utf-8 -*-
__author__ = 'alex'

from lxml.html import parse

def parse_html(html_address,xpath_expression):
    page = parse(html_address)
    for href in page.xpath(xpath_expression):
        print href

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#!/usr/bin/python
import MySQLdb

db = MySQLdb.connect(host="localhost", # your host, usually localhost
                     user="john", # your username
                      passwd="megajonhy", # your password
                      db="jonhydb") # name of the data base

# you must create a Cursor object. It will let
#  you execute all the queries you need

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import smtplib

def send_email_over_smtps(to_email,login_user,login_pwd):
    smtpserver = smtplib.SMTP("10.168.2.120",587)
    smtpserver.ehlo()
    smtpserver.starttls()
    smtpserver.ehlo
    smtpserver.login(login_user, login_pwd)
    header = 'To:' + to_email + '\n' + 'From: ' + login_user + '\n' + 'Subject:testing \n'
    print header