Le 22-05-2006, Matteo <[EMAIL PROTECTED]> nous disait:
> Hi all,
>
> i've noticed a strange beaviour of string.count:
>
> in my mind this code must work in this way:
>
> str = "a_a_a_a_"
> howmuch = str.count("_a_")
> print howmuch -> 3
>
> but the count return only 2
>
> Ok this can be fine, but why? The doc string tell that count will
> return the number of substring in the master string, if we spoke about
> substring i count 3 substring...
>
> Can someone explain me this? And in which way i can count all the
> occurrence of a substring in a master string? (yes all occurrence
> reusing already counter character if needed)
Use the optional start argument of find or index in a loop, such as:
>>> def count_all(string, substring):
... index = 0
... count = 0
... while True:
... index = string.find(substring, index)
... if index < 0:
... return count
... else:
... count += 1
... index += 1
...
>>> count_all("a_a_a_a_", '_a_')
3
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