Replacing large number of substrings

[Will McGugan]

Hi,

Is there a simple way of replacing a large number of substrings in a 
string? I was hoping that str.replace could take a dictionary and use it 
to replace the occurrences of the keys with the dict values, but that 
doesnt seem to be the case.

To clarify, something along these lines..

 >>> dict_replace( "a b c", dict(a="x", b="y") )
"x y c"


Regards,

Will McGugan
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