substitution

[superpollo]

superpollo ha scritto:
> 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

i explain better:

say the subs are:

quuux --> foo
foo --> bar
baz --> quux

then i cannot apply the subs in sequence (say, .replace() in a loop), 
otherwise:

fooxxxbazyyyquuux --> fooxxxbazyyyfoo --> barxxxbazyyybar --> 
barxxxquuxyyybar

not as intended...