1. #!/usr/bin/env python
2. #coding:utf8
4. import os
6. for tmpdir in ('/tmp', r'c:\temp'):
7. if os.path.isdir(tmpdir):
8. break
9. else:
10. print '没有这个目录'
11. tmpdir = ''
13. if tmpdir:
14. os.chdir(tmpdir)
15. cwd = os.getcwd()
16. print '当前临时目录'
17. print cwd
19. print '创建目录'
20. os.mkdir('example')
21. os.chdir('example')
22. cwd = os.getcwd()
23. print '新目录'
24. print cwd
26. print '列出目录'
27. print os.listdir(cwd)
28. fobj = open('test', 'w')
29. fobj.write('test1\n')
30. fobj.write('test2\n')
31. fobj.close()
33. print '更新目录列表'
34. print os.listdir(cwd)
36. print '重新改名'
37. os.rename('test', 'filetest.txt')
39. print '重新列出目录'
40. print os.listdir(cwd)
42. path = os.path.join(cwd, os.listdir(cwd)[0])
43. print '完整路径'
44. print path
46. print 'pathname, basename'
47. print os.path.split(path)
49. print '文件名, 扩展名'
50. os.path.splitext(os.path.basename(path))
52. print '显示文件内容'
53. fobj = open(path)
54. for eachline in fobj:
55. print eachline,
56. fobj.close()
58. print '删除test文件'
59. os.remove(path)
60. print '更新目录'
61. print os.listdir(cwd)
63. os.chdir(os.pardir)
64. print '删除test目录'
65. os.rmdir('example')
66. print 'END!'

 异常

处理方法一：

1. #!/usr/bin/env python
3. import time
5. for i in range(10):
6. print i
7. try:
8. time.sleep(1)
9. except KeyboardInterrupt:
10. break

处理方法二：

1. #!/usr/bin/env python
3. try:
4. s = 100 / int(raw_input('enter a number: '))
5. except (ValueError, ZeroDivisionError):
6. print 'Invalid input'
7. else:
8. print s

处理方法三：

1. #!/usr/bin/env python
3. try:
4. s = 100 / int(raw_input('enter a number: '))
5. except ValueError:
6. print 'Invalid input: Please input a number.'
7. except ZeroDivisionError:
8. print 'input a non-zero number.'
9. else:
10. print s

处理方法四：

1. #!/usr/bin/env python
3. try:
4. s = 100 / int(raw_input('enter a number: '))
5. except ValueError:
6. print 'Invalid input: Please input a number.'
7. except ZeroDivisionError, e:
8. print 'Error: ', e
9. else:
10. print s

处理方法五；     不推荐这种方法

1. #!/usr/bin/env python
3. try:
4. s = 100 / int(raw_input('enter a number: '))
5. except:
6. print 'Error'

处理方法六：

1. #!/usr/bin/env python
3. try:
4. s = 100 / int(raw_input('enter a number: '))
5. except (ValueError, ZeroDivisionError), e:
6. print 'Error:', e
7. else:
8. print s
9. finally:
10. print 'Done.'

处理方法七：

1. #!/usr/bin/env python
3. i = 0
4. while True:
5. print i
6. i += 1
7. if i > 10:
8. try:
9. raise ValueError
10. except ValueError:
11. print 'Error'
12. break

处理方法八：

1. #!/usr/bin/env python
3. i = 0
5. while True:
6. print i
7. i += 1
8. try:
9. assert i < 5
10. except AssertionError:
11. break