#python 3.6
#蔡军生 
#http://blog.csdn.net/caimouse/article/details/51749579
#
import re


text = 'This is some text -- with punctuation.'
pattern = 'is'


print('Text    :', text)
print('Pattern  :', pattern)


m = re.search(pattern, text)
print('Search   :', m)
s = re.fullmatch(pattern, text)
print('Full match :', s)




text = 'is'
print('Text    :', text)
s = re.fullmatch(pattern, text)
print('Full match :', s)


text = 'iss'
print('Text    :', text)
s = re.fullmatch(pattern, text)
print('Full match :', s)

Text    : This is some text -- with punctuation.
Pattern  : is
Search   : <_sre.SRE_Match object; span=(2, 4), match='is'>
Full match : None
Text    : is
Full match : <_sre.SRE_Match object; span=(0, 2), match='is'>
Text    : iss
Full match : None