参数和数学计算：
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#!C:\\python26\\python.exe
#Name: jisuan.py
#eg: 1+2+3+4+...+x
import math
import sys
if len(sys.argv) != 2:
print "Usage: "+sys.argv[0]+" 10000"
else:
sumx=0
x=int(sys.argv[1])
for i in range(0,x+1,1):
sumx=sumx+i
print sumx
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交互的用法：
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#!C:\\python26\\python.exe
NAME=raw_input ("Please input your name here: ")
print "Your name is " + NAME + "!"
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调用系统命令：
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Linux:
----------------------
#!/usr/bin/python
import os
print "\n"
os.system('ls')
print "\n\n"
os.system(''' ifconfig|grep 192|awk '{print $2}'|awk -F: '{print $2}' ''')
Windows:
----------------------
import os
os.system('ping 127.0.0.1')
os.system('ipconfig')
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列表和range：
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word=list("zhaohang")
for w in word:
print w
print "\n"
for i in range(0,31,5):
print i,
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while、if、try 判断是否数字：
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print 'Could you guess me ? I am a int number!'
running=True
while running:
try:
NUM=287
GUESS=int(raw_input('Begin to guess me: '))
if GUESS == 287:
print 'Eo, you guess right. You are verry clever!'
running = False
elif GUESS < 287:
print 'It\'s too small!'
else:
print 'It\'s too big!'
except ValueError:
print "You must input a number!"
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判断是否纯数字的函数：
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#!/usr/bin/env python
GUESS=raw_input('Begin to guess me: ')
if GUESS.isdigit():
print "OK"
else:
print "It's not a number!"
说明：判断变量是否纯数字的方法一种是 变量.isdigit() ，为真说明纯数字，但这种方法对于包含正负号的数字字符串无效，这时可以用： ValueError: 如上面实例！
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程序中quit来控制退出：
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while True:
GUESS = raw_input("Please input a string: ")
if GUESS == "quit":
break
if len(GUESS) <= 3:
continue
else:
print "Your are input: " + GUESS + " !"
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帮助函数：
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def USAGE():
print '''\
This script is a example for function. (HanShu)
It will get a simple usage for us!
Usage: file.py 100
--help: print this text.
--version: 2.6
'''
# Call the function.
USAGE()
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自定义函数：
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def maxnum(x,y):
if x > y:
print x,"is the max number!"
else:
print y,"is the max number!"
x = float(raw_input("Please input the first number: "))
y = float(raw_input("Please input the second number: "))
maxnum(x,y)
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def func(a=0):
print "a =",a
func()
func(5)
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函数的返回值：
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def func(a,b):
if a > b:
return a
else:
return b
a = int(raw_input("The first number: "))
b = int(raw_input("The second number: "))
print "The max number is: ",func(a,b)
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pass（空语句块）、continue（返回执行）、break（中断跳出循环）、sys.exit()退出程序：
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while True:
a = input("Please input a number: ")
if a > 80:
pass
break
else:
continue
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自定义模块的创建和应用：
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# filename: zhaohang_hi_module.py
def sayhi():
print 'Hi! This is my module speaking!'
version = 'V1.00'
调用：
import zhaohang_hi_module
zhaohang_hi_module.sayhi()
print "My module version is:",zhaohang_hi_module.version
或：
from zhaohang_hi_module import sayhi
sayhi()
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递归查找文件os.walk：
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#!/bin/env python
import os,sys
for root,dirs,files in os.walk('/etc'):
if sys.argv[1] in files:
#print root
#print files
#print dirs
print os.path.join(root,sys.argv[1])
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字典学习：
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#!/usr/bin/env python
import sys
dic_file = open('/root/dic.txt','r')
dic = {}
for line in dic_file.readlines():
(key, value) = line.split()
dic[key] = value
dic_file.close()
print dic.get(sys.argv[1])
#print dic.items()
#print dic.values()
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文件字符串替换：
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#/etc/env python
import re,string
f='/root/test.txt'
files=open('%s'%(f),'rw')
file=files.readlines()
files.close()
F = open('%s'%(f),'w')
for i in file:
f1 = i.replace('zhaohang','Droney')
F.write(f1)
F.close()
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输入字符串反向输出：
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#!/bin/env python
import sys
newStr=''
x=len(sys.argv[1])
for y in range(x):
newStr=newStr+sys.argv[1][x-1-y]
print newStr
或：
str = raw_input('Please input:')
print str[::-1]
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综合应用：
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import sys
def readfile(filename):
f = file(filename)
while True:
line = f.readline()
if len(line) == 0:
break
print line
f.close()
if len(sys.argv) < 2:
print "No action!"
sys.exit()
if sys.argv[1].startswith('--'):
option = sys.argv[1][2:]
if option == 'version':
print 'Version 2.6'
elif option == 'help':
print '''
This Script will print the file you wan't to see, It like the "cat" in
Any number of files could be specified.
Options include:
--version: Print the verison of your Python.
--help: Display this help.'''
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随机函数的应用：
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import random
random.random()
random.choice(range(500))
random.choice(['A','a','B','b','C','c','D','d','!','1','@','2','#','3'])
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互联网访问：
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#!c:\\python26\\python.exe
import urllib2
for line in urllib2.urlopen(''):
if 'Central' in line:
print line
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邮件发送:
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import smtplib
server = smtplib.SMTP('mail.ztgame.com',25)
tolist = ["zhaozhaohang@ztgame.com","281540639@qq.com","zhaohang3031@163.com"]
fromuser = "zhaohang3031@163.com"
msg = '''
From: zhaozhaohang@ztgame.com
Subject: test mail.
This just a mail for test.
OK!
'''
server.sendmail(fromuser,tolist,msg)
server.quit()
# shell> mail -s "$subject" "$to_addr_list" -c "$cclist" < $filename
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