exercises.py

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

import random

raw = [1,2,3,4,5,6,7,8,9,0]
print raw

b = raw.pop(0)
print b
raw.append(b)
print raw

# ~~~~~~~~另一个练习~~~~ MYSQLdb

import MYSQLdb

db = MYSQLdb.connect(host="localhost", #host
	     user="john", # username
	     passwd="megajonhy", #password
	     db="jonhydb")
# you must create a Cursor object. It will let you execute all the queries you need
cur = db.cursor()

# Use all the SQL you like
cur.execute(SELECT * FROM YOUR_TABLE_NAME)

# print the first cell of all the rows
for row in cur.fetchall():
	print row[0]




list = [random.randint(0,100) for i in range(40)]
print list

def add_function(a,b):
	c = a + b
	print c

add_function(6,6)

def fibs(n):
	result = [0, 1]
	for i in range(n-2):
		result.append(result[-2] + result[-1])
	return result

lst = fibs(10)
print lst


def func(x, *arg):
	print x
	result = x
	print arg
	for i in arg:
		result += i
	return result


print func(1)

def fib(n):
	if n == 0:
		return 0
	elif n == 1:
		return 1
	else:
		return fib(n-1) + fib(n-2)
print fib(10)


# CS11Python
class Animal:
	""" Inheritance example """
	def __init__(self, weight):
		self.weight = weight
	def eat(self):
		print "I am eating"
	def __str__(self):
		return "Animal; weight = %d % \
		    self,weight"

class Super:
	def __init__(self, x):
		self.x =x

class Sub(Super):
	def __init__(self, y):
		Super.__init__(self, y)
		self.y = y
		
		
		
##############


import eventlet
from eventlet.green import urllib2

urls=["http://www.douban.com",
       "http://weibo.com"]

def fetch(url):
	return url, urllib2.urlopen(url).info()

pool =eventlet.GreenPool(2)

for url, body in pool.imap(fetch,urls):
    print str(body)