Question

我有一个函数我想用来检查一个字符串是否已包含在给定文件中。

该功能如下所示：

def check_dupe(filename, word):
    print(filename)
    print(word)
    with open(filename, 'rb', 0) as file, mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ) as s:
        if s.find(word.encode()) != -1:
            print('dupe')
            return True

我收到以下错误：

<_io.TextIOWrapper name='links' mode='r' encoding='ANSI_X3.4-1968'>
Traceback (most recent call last):
  File "checker.py", line 277, in <module>
    main()
  File "checker.py", line 261, in main
    text_links = [line.strip() for line in f if not check_dupe('completed_links', f)]
  File "checker.py", line 261, in <listcomp>
    text_links = [line.strip() for line in f if not check_dupe('completed_links', f)]
  File "checker.py", line 240, in check_dupe
    if s.find(word.encode()) != -1:
AttributeError: '_io.TextIOWrapper' object has no attribute 'encode'

如何防止这种情况发生？

Answer 1

只需阅读stackstrace，从下到上：

<_io.TextIOWrapper name='links' mode='r' encoding='ANSI_X3.4-1968'>
Traceback (most recent call last):
  File "checker.py", line 277, in <module>
    main()
  File "checker.py", line 261, in main
    text_links = [line.strip() for line in f if not check_dupe('completed_links', f)]
  File "checker.py", line 261, in <listcomp>
    text_links = [line.strip() for line in f if not check_dupe('completed_links', f)]
  File "checker.py", line 240, in check_dupe
    if s.find(word.encode()) != -1:
AttributeError: '_io.TextIOWrapper' object has no attribute 'encode'

word是_io.TextIOWrapper，您尝试调用其不存在的encode()方法。

word是您传递到check_dupe()函数的参数，第261行：

[line.strip() for line in f if not check_dupe('completed_links', f)]

您将f作为word的参数传递，f是您从中读取行的文件。我想这是一个用open（“filename”）打开的文件，它返回_io.TextIOWrapper

我想你的意思是将line作为参数传递，这确实是一个字符串：

[line.strip() for line in f if not check_dupe('completed_links', line)]

欺骗检查功能中的编码错误

1 个答案: