python - Count Repeated occurence of a substring in string -


suppose have string this

aa = 'booked#booked#available#available#available#available#available#booked#available#booked'

now want find out 'available' substring has occur in string how many times repeatedly. in case should 5 `'available' coming 5 times repeatedly,it helpful if can give python library function this, regex solutions welcoming.

what have tried far 

aa.count('#available')

which giving me 6, 

aa.count('#available#available')

which again wrong.

import re count(re.findall('available#'))

is wrong

groupby itertools splendid these types of problems:

from itertools import groupby aa = 'booked#booked#available#available#available#available#available#booked#available#booked' words = aa.split('#') key, group in groupby(words):     print len(list(group)), key

output:

2 booked 5 available 1 booked 1 available 1 booked

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