[Tutor] Regular expression grouping insert thingy

[Matthew Wood]

re.sub(r'(\d+)x', r'\1*x', input_text)

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On Tue, Jun 8, 2010 at 10:11 PM, Lang Hurst <lang at tharin.com> wrote:

> This is so trivial (or should be), but I can't figure it out.
>
> I'm trying to do what in vim is
>
> :s/\([0-9]\)x/\1*x/
>
> That is, "find a number followed by an x and put a "*" in between the
> number and the x"
>
> So, if the string is "6443x - 3", I'll get back "6443*x - 3"
>
> I won't write down all the things I've tried, but suffice it to say,
> nothing has done it.  I just found myself figuring out how to call sed and
> realized that this should be a one-liner in python too.  Any ideas?  I've
> read a lot of documentation, but I just can't figure it out.  Thanks.
>
> --
> There are no stupid questions, just stupid people.
>
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