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Groups > comp.lang.python > #61266

Re: Is It Bug?

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On 08/12/2013 00:59, Mahan Marwat wrote:
> Why this is not working.
>
>>>> 'Hello, \\\\World'.replace('\\', '\\')
>
> To me, Python will interpret '\\\\' to '\\'. And the replace method
> will replace '\\' with '\'. So, the result will be 'Hello, \World'.
> But it's give me 'Hello, \\\\World'.
>
> The result I want form the code is 'Hello, \World'.
>
The original string contains 2 actual backslashes:

>>> print('Hello, \\\\World')
Hello, \\World

Both the search and replacement strings contain 1 backslash:

>>> print('\\')
\

You're asking it to replace every backslash with a backslash!

If you want to replace 2 consecutive backslashed with a single
backslash:

 >>> 'Hello, \\\\World'.replace('\\\\', '\\')
'Hello, \\World'

Maybe it's clearer if you print it:

 >>> print('Hello, \\\\World'.replace('\\\\', '\\'))
Hello, \World

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Thread

Is It Bug? Mahan Marwat <mahanmarwat@gmail.com> - 2013-12-07 16:59 -0800
  Re: Is It Bug? Chris Angelico <rosuav@gmail.com> - 2013-12-08 12:05 +1100
    Re: Is It Bug? Roy Smith <roy@panix.com> - 2013-12-07 20:22 -0500
      Re: Is It Bug? Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2013-12-08 11:01 +0100
      Re: Is It Bug? Chris Angelico <rosuav@gmail.com> - 2013-12-08 21:04 +1100
      Re: Is It Bug? Chris Angelico <rosuav@gmail.com> - 2013-12-08 21:26 +1100
  Re: Is It Bug? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-08 01:06 +0000
  Re: Is It Bug? MRAB <python@mrabarnett.plus.com> - 2013-12-08 01:12 +0000
  Re: Is It Bug? Tim Roberts <timr@probo.com> - 2013-12-07 22:53 -0800
  Re: Is It Bug? Peter Otten <__peter__@web.de> - 2013-12-08 11:43 +0100

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