python3 计算字符串相识度

# -*- coding: utf-8 -*-
"""
Created on Wed Feb 13 12:52:17 2019
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@author: Administrator
"""

import difflib

if __name__ == '__main__':
    a = '123456a'
    b = '234567b'
    Str = '上海中心大厦上海中心大厦1'
    s1  = '大厦'
    s2  = '上海中心'
    s3  = '上海中心大厦2'
    s4  = '上海中心大厦上海中心大厦3'
    print(difflib.SequenceMatcher(None, Str, s1).quick_ratio())  
    print(difflib.SequenceMatcher(None, Str, s2).quick_ratio())  
    print(difflib.SequenceMatcher(None, Str, s3).quick_ratio())
    print(difflib.SequenceMatcher(None, Str, s4).quick_ratio())

    Str = '关于报送电话的通知'
    Str2 = '关于报送电话的通知1'    
    
    print(difflib.SequenceMatcher(None, Str, s1).quick_ratio())

0.26666666666666666
0.47058823529411764
0.6
0.9230769230769231