零基础入门学Python 课时29 文件:一个任务

黄金猫

1. 动动手:
   
2. 0.
   
3. lines = []
   
4. 
   
5. file_name = input('请输入文件名:')
   
6. 
   
7. print("请输入内容(单独输入':w'保存退出):")
   
8. words = input() + '\n'
   
9. 
   
10. while words != ':w\n':
    
11.    
    
12.     line = lines.append(words)
    
13.     words = input() + '\n'
    
14. 
    
15. f = open('/Users/yufan/Documents/python编程/29/29dds0/%s' % file_name,'x',encoding = 'GBK')
    
16. f.writelines(lines)
    
17. f.close()
    
18. 
    
19. 1.
    
20. f1 = open('/Users/yufan/Documents/python编程/29/29dds1/余二娃',encoding = 'GBK')
    
21. f2 = open('/Users/yufan/Documents/python编程/29/29dds1/余三娃',encoding = 'GBK')
    
22. 
    
23. f1_string = []
    
24. f2_string = []
    
25. count = 0
    
26. wrong_line = []
    
27. 
    
28. for file_line in f1:
    
29.     f1_string.append(file_line)
    
30. 
    
31. for file_line in f2:
    
32.     f2_string.append(file_line)
    
33. 
    
34. small_len = len(f1_string) if len(f1_string) < len(f2_string) else len(f1_string)
    
35. 
    
36. for each_index in range(small_len):
    
37.     if f1_string[each_index] != f2_string[each_index]:
    
38.         count += 1
    
39.         wrong_line.append(count)
    
40.     else:
    
41.         count += 1
    
42. 
    
43. print('两个文件一共有%d处不同:' % len(wrong_line))
    
44. for each in wrong_line:
    
45.     print('第 %d 行不一样' % each)
    
46. 
    
47. f2.close()
    
48. f1.close()
    
49. 2.
    
50. file_name = input('请输入你要打开的文件(/Users/yufan/Documents/python编程/29/29dds2)下:')
    
51. row = int(input('请输入需要显示该文件的前几行:'))
    
52. 
    
53. f = open('/Users/yufan/Documents/python编程/29/29dds2/%s' % file_name, encoding = 'GBK')
    
54. 
    
55. L = list(f)
    
56. n = 0
    
57. while n < row:
    
58.     print(L[n])
    
59.     n += 1
    
60. 
    
61. f.close()
    
62. 3.
    
63. file_name = input('请输入你要打开的文件(/Users/yufan/Documents/python编程/29/29dds2)下:')
    
64. f = open('/Users/yufan/Documents/python编程/29/29dds2/%s' % file_name, encoding = 'GBK')
    
65. L = list(f)
    
66. string = []
    
67. 
    
68. (start,end) = input('请输入需要显示该文件的行数(例如 13:21 或 :21 或 21:):').split(':',1)
    
69. 
    
70. if start == '':
    
71.     start = 1
    
72. else:
    
73.     start = int(start)
    
74.         
    
75. if end == '':
    
76.     end = len(L)
    
77. else:
    
78.     end = int(end)
    
79. while True:
    
80.     if start > len(L) or start < 0 or end >len(L):
    
81.         print('你输入的数字超出最大范围,请重新输入!')
    
82.         (start,end) = input('请输入需要显示该文件的行数(例如 13:21 或 :21 或 21:):').split(':',1)
    
83.         if start == '':
    
84.             start = 1
    
85.         else:
    
86.             start = int(start)
    
87.         if end == '':
    
88.             end = len(L)
    
89.         else:
    
90.             end = int(end)
    
91.     else:
    
92.         break
    
93. 
    
94. n = start
    
95. 
    
96. while n <= end:
    
97.     string.append((L[n - 1]))
    
98.     n += 1
    
99. 
    
100. if start != 0 and end != 0:
     
101.     print('文件%s从第%d行到第%d行的内容如下:' % (file_name,start,end))
     
102. elif start == 1 and end != 0:
     
103.     print('文件%s从第开始到第%d行的内容如下:' % (file_name,end))
     
104. elif end ==len(string) and start != 1:
     
105.     print('文件%s从第%d行到末尾的内容如下:' % (file_name,start))
     
106. else:
     
107.     print('你在逗我,0到0行噢?')
     
108. 
     
109. for each_line in string:
     
110.     print(each_line)
     
111. 
     
112. f.close()

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