substitution

[Anthra Norell]

superpollo wrote:
>> hi.
>>
>> what is the most pythonic way to substitute substrings?
>>
>> eg: i want to apply:
>>
>> foo --> bar
>> baz --> quux
>> quuux --> foo
>>
>> so that:
>>
>> fooxxxbazyyyquuux --> barxxxquuxyyyfoo
>>
>> bye
>
>

Third attempt. Clearly something doesn't work right. My code gets 
clipped on the way up. I have to send it as an attachment. Here's again 
what it does:

 >>> substitutions = (('foo', 'bar'), ('baz', 'quux'), ('quuux', 
'foo'))   # Sequence of doublets
 >>> T = Translator (substitutions)   # Compile substitutions -> translator
 >>> s = 'fooxxxbazyyyquuux'   # Your source string
 >>> d = 'barxxxquuxyyyfoo'    # Your destination string
 >>> print T (s)
barxxxquuxyyyfoo
 >>> print T (s) == d
True


Code attached

Regards

Frederic


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