Making the substitution string raw in re.sub()

[Fredrik Lundh]

Joakim Hove wrote:
> I'm using the re module to perform some substitutions on a string:
>
>     OldString = "See for instance EXPAND(key1)"
>     newString = r"Volume {\bf 45}"
>     print re.sub(r"EXPAND\(\s*(\w+?)\s*\)" , newString , OldString , 1)
>
> But, when I run this the newString is not properly escaped, and
> what I get is:
> >>> See for instance Volume f 45}
>
> instead of:
>
> >>> See for instance Volume {\bf 45}
>
> Which is what I wanted. ANy tips to how I Could solve this??

re.escape is your friend:

    newString = re.escape(r"Volume {\bf 45}")

</F>

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