常用的功能

import random

#生成1-1000之间的伪随机数
num = random.randint(1,1000)

read = open("c:\\text.txt","r")
lines = read.readlines()
for line in lines:
print line

w = open("c:\\test.txt","r+")
w.write("123")

import MySQLdb
conn = MySQLdb.connect (host='localhost',databse='test',user='test',password='123')
sql= conn.cursor()
sql.execute("select * from test")
print sql.rowcount