9.Document-complie-operations.py

import re
my_str="This is about python. Python is easy to learn  and we have two major versions: python2 and python3 "

my_pat=r'\bPython[23]?\b'

#print(re.search(my_pat,my_str))
#print(re.findall(my_pat,my_str,flags=re.I))
#print(re.split(my_pat,my_str))


pat_ob=re.compile(my_pat,flags=re.I)
print(pat_ob)
print(pat_ob.search(my_str))
print(pat_ob.findall(my_str))


#re.findall(my_pat,my_str)===> re.complie(my_pat).findall(my_str)