7.Document-find-all-find-iter.py

import re
my_str="This is python and we are having python2 and python3 version"
my_pat=r'\bpython[23]?\b'
#print(re.search(my_pat,my_str))
#print(len(re.findall(my_pat,my_str)))
#print(re.findall(my_pat,my_str))

for each_ob in re.finditer(my_pat,my_str):
	print(f'The match is: {each_ob.group()} starting index: {each_ob.start()}, ending index {each_ob.end()-1}')