Replacing last comma in 'C1, C2, C3' with 'and' so that it reads 'C1, C2 and C3'

[Florian Diesch]

Ric Da Force <ric at next-level.com.au> wrote:
> I have a string such as 'C1, C2, C3'.   Without assuming that each bit of 
> text is of fixed size, what is the easiest way to change this list so that 
> it reads:
> 'C1, C2 and C3' regardless of the length of the string.

>>> import re
>>> data = "the first bit, then the second, finally the third"
>>> re.sub(r"(.*),", r"\1 and", data)
'the first bit, then the second and finally the third'
>>> 


   Florian
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