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Is It Bug?

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  Is It Bug? Mahan Marwat <mahanmarwat@gmail.com> - 2013-12-07 16:58 -0800
    Re: Is It Bug? Iuri <iurisilvio@gmail.com> - 2013-12-07 23:04 -0200
    Re: Is It Bug? rusi <rustompmody@gmail.com> - 2013-12-07 21:48 -0800
    Re: Is It Bug? Joshua Gardner <mellowcellofellow@gmail.com> - 2013-12-07 23:39 -0700

#61260 — Is It Bug?

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'.

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#61263

[Multipart message — attachments visible in raw view] — view raw

This way, it will replace '\' with '\', so nothing change.

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


On Sat, Dec 7, 2013 at 10:58 PM, Mahan Marwat <mahanmarwat@gmail.com> 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'.
> --
> https://mail.python.org/mailman/listinfo/python-list
>

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#61272

On Sunday, December 8, 2013 6:28:24 AM UTC+5:30, 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'.

I am mystified by this question.
Yes '\\' may be one slash or two or something else more exotic.
But whatever it is (and its not a syntax error like with '\') it is something.
So how can ....replace(something,something)....  be anything other
than a no-op?

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#61273

If I'm having to deal with incessant backslashes in a string I'll often
use the r'\' (raw string literal) syntax. Simplifies things quite a bit.

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