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1.hello world
print("hello world")
2.变量定义的规则
3.字符编码-*-coding:utf-8-*-
在python2.0版本中，不声明字符编码则不支持中文
python3.0可以不声明默认是 -*-coding:utf-8-*-
4.注释：
单行注释: "#"
多行注释: " ‘‘‘ "(3个单引号)
5.输入
name_input=input("用户名：")
password_input=input("密码")
1 #!/usr/bin/env python 2 #-*-coding:utf-8-*- 3 4 import getpass 5 password_input=getpass.petpass("密码：")
6.模块
1 #!/usr/bin/env python 2 # -*- coding: utf-8 -*- 3 4 import os 5 6 os.system("df -h") #调用系统命令
1 #!/usr/bin/env python 2 # -*- coding: utf-8 -*- 3 4 import sys 5 6 print(sys.argv) 7 8 9 #输出 10 $ python test.py helo world 11 [‘test.py‘, ‘helo‘, ‘world‘] #把执行脚本时传递的参数获取到了
1 import sys 2 import readline 3 import rlcompleter 4 5 if sys.platform == ‘darwin‘ and sys.version_info[0] == 2: 6 readline.parse_and_bind("bind ^I rl_complete") 7 else: 8 readline.parse_and_bind("tab: complete") # linux and python3 on mac 9 10 for mac
1 #!/usr/bin/env python 2 # python startup file 3 import sys 4 import readline 5 import rlcompleter 6 import atexit 7 import os 8 # tab completion 9 readline.parse_and_bind(‘tab: complete‘) 10 # history file 11 histfile = os.path.join(os.environ[‘HOME‘], ‘.pythonhistory‘) 12 try: 13 readline.read_history_file(histfile) 14 except IOError: 15 pass 16 atexit.register(readline.write_history_file, histfile) 17 del os, histfile, readline, rlcompleter 18 19 for Linux
可以从网上找
7.格式化输出
1 name_input = input(‘name:‘) 2 age_input = int(input(‘age:‘)) 3 job_input = input(‘job:‘) 4 msg = ‘‘‘ 5 Infomation of user %s 6 -------------------- 7 Name: %s 8 Age : %d 9 Job : %s 10 -------END---------- 11 ‘‘‘%(name_input,name_input,age_input,job_input) 12 print(msg) 13 print("姓名：",name_input) 14 print("年龄:",age_input) 15 print("职业:",job_input)
%s字符串
%d数字
8.for循环
1 #!/usr/bin/env python 2 #-*-coding:utf-8-*- 3 num = 20 4 counter = 0 5 for i in range(10): 6 if counter<3: 7 guess_num = int(input("输入年龄：")) 8 if guess_num > num: 9 print("猜大了") 10 elif guess_num < num: 11 print("猜小了") 12 else: 13 print("猜对了") 14 break 15 else: 16 couter_confirm = input("还想继续吗？") 17 if couter_confirm == ‘y‘: 18 counter = 0 19 continue 20 else: 21 print("bay!") 22 break 23 counter +=1
break跳出本层循环
continue不向下循环从头开始循环
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原文地址：http://www.cnblogs.com/zhangkui/p/5494047.html
