Groups > comp.lang.python > #20528

Re: Undoing character read from file

Date	2012-02-16 23:31 +0000
From	MRAB <python@mrabarnett.plus.com>
Subject	Re: Undoing character read from file
References	<CAOypoo53NuLCfju_YuYh6AHR4g0GuN=EbKnmh7KY-3nxbaOSLg@mail.gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.5904.1329435244.27778.python-list@python.org> (permalink)

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On 16/02/2012 23:10, Emeka wrote:
> Hello All,
>
> I know about seek and tell while using readline. What about if I am
> using read, and I want to undo the last character I just read(to return
> it back to the stream). How do I achieve this?
>
Try:

     f.seek(-1, 1)

It seeks -1 relative to the current position (the second argument
defaults to 0 for relative to start of file).

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Re: Undoing character read from file MRAB <python@mrabarnett.plus.com> - 2012-02-16 23:31 +0000
  Re: Undoing character read from file Neil Cerutti <neilc@norwich.edu> - 2012-02-17 13:12 +0000
    Re: Undoing character read from file Dave Angel <d@davea.name> - 2012-02-17 22:58 -0500

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