python编程模板_常用python编程模板汇总

#!/usr/bin/python

# -*- coding: UTF-8 -*-

import MySQLdb

# 打开数据库连接

db = MySQLdb.connect("localhost","testuser","test123","TESTDB" )

# 使用cursor()方法获取操作游标

cursor = db.cursor()

# SQL 插入语句

sql = """INSERT INTO EMPLOYEE(FIRST_NAME,

LAST_NAME, AGE, SEX, INCOME)

VALUES ('Mac', 'Mohan', 20, 'M', 2000)"""

try:

# 执行sql语句

cursor.execute(sql)

# 提交到数据库执行

db.commit()

except:

# Rollback in case there is any error

db.rollback()

# 关闭数据库连接

db.close()

4、查询

#!/usr/bin/python

# -*- coding: UTF-8 -*-

import MySQLdb

# 打开数据库连接

db = MySQLdb.connect("localhost","testuser","test123","TESTDB" )

# 使用cursor()方法获取操作游标

cursor = db.cursor()

# SQL 查询语句

sql = "SELECT * FROM EMPLOYEE

WHERE INCOME > '%d'" % (1000)

try:

# 执行SQL语句

cursor.execute(sql)

# 获取所有记录列表

results = cursor.fetchall()

for row in results:

fname = row[0]

lname = row[1]

age = row[2]

sex = row[3]

income = row[4]

# 打印结果

print "fname=%s,lname=%s,age=%d,sex=%s,income=%d" %

(fname, lname, age, sex, income )

except:

print "Error: unable to fecth data"

# 关闭数据库连接

db.close()

5、更新

#!/usr/bin/python

# -*- coding: UTF-8 -*-

import MySQLdb

# 打开数据库连接

db = MySQLdb.connect("localhost","testuser","test123","TESTDB" )

# 使用cursor()方法获取操作游标

cursor = db.cursor()

# SQL 更新语句

sql = "UPDATE EMPLOYEE SET AGE = AGE + 1

WHERE SEX = '%c'" % ('M')

try:

# 执行SQL语句

cursor.execute(sql)

# 提交到数据库执行

db.commit()

except:

# 发生错误时回滚

db.rollback()

# 关闭数据库连接

db.close()

三、Socket

1、服务器

from socket import *

from time import ctime

HOST = ''

PORT = 21568

BUFSIZ = 1024

ADDR = (HOST, PORT)

tcpSerSock = socket(AF_INET, SOCK_STREAM)

tcpSerSock.bind(ADDR)

tcpSerSock.listen(5)

while True:

print 'waiting for connection...'

tcpCliSock, addr = tcpSerSock.accept()

print '...connected from:', addr

while True:

try:

data = tcpCliSock.recv(BUFSIZ)

print '

2、客户端

from socket import *

HOST = 'localhost'

PORT = 21568

BUFSIZ = 1024

ADDR = (HOST, PORT)

tcpCliSock = socket(AF_INET, SOCK_STREAM)

tcpCliSock.connect(ADDR)

try:

while True:

data = raw_input('>')

if data == 'close':

break

if not data:

continue

tcpCliSock.send(data)

data = tcpCliSock.recv(BUFSIZ)

print data

except:

tcpCliSock.close()

四、多线程

import time, threading

# 新线程执行的代码:

def loop():

print 'thread %s is running...' % threading.current_thread().name

n = 0

while n < 5:

n = n + 1

print 'thread %s >>> %s' % (threading.current_thread().name, n)

time.sleep(1)

print 'thread %s ended.' % threading.current_thread().name

print 'thread %s is running...' % threading.current_thread().name

t = threading.Thread(target=loop, name='LoopThread')

t.start()

t.join()

print 'thread %s ended.' % threading.current_thread().name

还请大家积极补充！

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