贪婪模式和非贪婪模式

"""
贪婪模式指 Python 里数量词默认是贪婪的，总是尝试匹配尽可能多的字符。非贪婪模
式与贪婪相反，总是尝试匹配尽可能少的字符，可以使用"*","?","+","{m,n}"后面加上？，使
贪婪变成非贪婪
"""
import re
v = re.match(r'(.+)(\d+-\d+-\d+)','This is my tel:133-1234-1234')
print('----------贪婪模式---------')
print(v.group(1))
print(v.group(2))
print(v.groups()[0])
print(v.groups()[1])
v = re.match(r'(.+)(\d+-\d+-\d+)','This is my tel:133-1234-1234')
print('----------非贪婪模式---------')
v = re.match(r'(.+?)(\d+-\d+-\d+)','This is my tel:133-1234-1234')
print(v.group(1))
print(v.group(2))

print('**************实例2**************')
print('----------贪婪模式---------')
v = re.match(r'abc(\d+)','abc123')
print(v.group(1))
print('----------非贪婪模式---------')
v = re.match(r'abc(\d+?)','abc123')
print(v.group(1))

----------贪婪模式---------
This is my tel:13
3-1234-1234
This is my tel:13
3-1234-1234
----------非贪婪模式---------
This is my tel:
133-1234-1234
**************实例2**************
----------贪婪模式---------
123
----------非贪婪模式---------
1