Undoing character read from file

MRAB python at mrabarnett.plus.com
Fri Feb 17 00:31:54 CET 2012

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?

     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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