manstey schreef:
> Roel Schroeven wrote:
>> manstey schreef:
>>> I often have code like this:
>>>
>>> data='asdfbasdf'
>>> find = (('a','f')('s','g'),('x','y'))
>>> for i in find:
>>> if i[0] in data:
>>> data = data.replace(i[0],i[1])
>>>
>>> is there a faster way of implementing this? Also, does the if clause
>>> increase the speed?
>> I think this is best done with translate() and string.maketrans() (see
>> http://docs.python.org/lib/node110.html#l2h-835 and
>> http://docs.python.org/lib/string-methods.html#l2h-208). An example:
> But what about substitutions like:
> 'ab' > 'cd', 'ced' > 'de', etc
>
> what is the fastest way then?
Ah, in that case I don't think you can do much better than you already
did. But I think the if clause doesn't increase the speed; it might even
decrease it. If you want to know for sure, use timeit to see what's fastest.
--
If I have been able to see further, it was only because I stood
on the shoulders of giants. -- Isaac Newton
Roel Schroeven
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