格式化字符串：

1. name=input("input your name:")
2. age=int(input("input your age:"))
3. job=input("input your job:")
5. msg='''
6. information of user %s:
7. ============================
8. Name: %s
9. Age: %d
10. Job: %s
11. -----------End--------------
12. '''%(name,name,age,job)
13. print(msg)

Tab补全：

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

if...else语句 验证用户登录：

1. #!/usr/bin/python
2. #-*-coding:utf-8 -*-
3. age=25
4. counter=0
5. for i in range(10):
6. if counter<3:
7. guess_num=int(input("Input an num:"))
8. if guess_num==age:
9. print("you are right")
10. break
11. elif guess_num>age:
12. print("it is > age")
13. else:
14. print("it is < age")
15. else:
16. #print("你已经输错了3次")
17. #break
18. continue_confirm=input("you are attempt three times,Are you continue")
19. if continue_confirm=='y':
20. counter=0
21. continue # 跳出当次循环进入下一个循环
22. else:
23. print("bye")
24. break
25. counter=counter+1
26. if i>10:
27. print("你已经超过10次")