python - Finding words around a substring -

i have extract 2 words before , after substring match in large string. example:

sub = 'name'  str = '''my name avi. name identifies are. important have name starting letter a.''' 

now have find occurences of sub in str , return following:

(my name avi), (name identifies who), (have name starting with)

note if re full stop after string words before string returned shown in example above.

what have tried?

>>> import re >>> text = '''my name avi. name identifies are. important have name starting letter a.''' >>> m in re.finditer( 'name', text ): ...     print( 'name found', m.start(), m.end() ) 

which gives me starting , ending position of matched substring. not able proceed further how find words around it.

import re sub = '(\w*)\w*(\w*)\w*(name)\w*(\w*)\w*(\w*)' str1 = '''my name avi. name identifies are. important have name starting letter a.''' in re.findall(sub, str1, re.i):     print " ".join([x x in if x != ""]) 

output

my name avi name identifies have name starting 

or,

sub = '\w*\w*\w*\w*name\w*\w*\w*\w*' in re.findall(sub, str1, re.i):     i=i.strip(" .")     print