如何摆脱python windows文件路径字符串中的双反斜杠？ [英] How to get rid of double backslash in python windows file path string?

问题描述

我有一个字典：

my_dictionary = {"058498":"table", "064165":"pen", "055123":"pencil"}

我重复一遍：

for item in my_dictionary:
    PDF = r'C:\Users\user\Desktop\File_%s.pdf' %item
    doIt(PDF)

def doIt(PDF):
    part = MIMEBase('application', "octet-stream")
    part.set_payload( open(PDF,"rb").read() )

但是我收到这个错误：

IOError: [Errno 2] No such file or directory: 'C:\\Users\\user\\Desktop\\File_055123.pdf'

找不到我的文件。为什么它认为文件路径中有双反斜杠？

It can't find my file. Why does it think there are double backslashes in file path?

推荐答案

双反斜杠没有错，python打印/表示它以用户的方式。如果 a = r'raw s\tring'和 b ='raw s\\\tring'（没有'r'和明确的双斜杠），那么它们都表示为'raw s\\\tring'。

The double backslash is not wrong, python prints/represents it that to the user way. If a = r'raw s\tring' and b = 'raw s\\tring' (no 'r' and explicit double slash) then they are both represented as 'raw s\\tring'.

>>> a = r'raw s\tring'
>>> b = 'raw s\\tring'
>>> a
'raw s\\tring'
>>> b
'raw s\\tring'

Btw，您的代码已清晰编辑由于错误信息和文件名之间存在明显的差异：

Btw, your code is clearly edited and mismatched between the actual and what you posted since there's an obvious difference in the error message and the filename:

您有：

PDF = r'C:\Users\user\Desktop\File_%s.pdf' %item

但输出显示：

'C:\\Users\\user\\Desktop\\Filed_055123.pdf'

请注意文件名中的额外 d 文件_ vs 文件_ 。错误信息可能来自您编辑的部分。

Note the extra d in the file name Filed_ vs File_. The error message may be coming from the part you've edited.

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