#python 3.6 
#蔡军生  
#http://blog.csdn.net/caimouse/article/details/51749579 
# 
import re 
text = u'Français złoty Österreich' 
pattern = r'w+' 
ascii_pattern = re.compile(pattern, re.ASCII) 
unicode_pattern = re.compile(pattern) 
print('Text  :', text) 
print('Pattern :', pattern) 
print('ASCII  :', list(ascii_pattern.findall(text))) 
print('Unicode :', list(unicode_pattern.findall(text))) 

Text  : Français złoty Österreich
Pattern : w+
ASCII  : ['Fran', 'ais', 'z', 'oty', 'sterreich']
Unicode : ['Français', 'złoty', 'Österreich']