定义rouge-L计算两个字符串的相似度python代码
时间: 2023-05-28 14:04:27 浏览: 124
以下是计算rouge-L相似度的Python代码:
```python
from collections import Counter
import numpy as np
def lcs(x, y):
"""
计算最长公共子序列的长度
"""
m = len(x)
n = len(y)
c = np.zeros((m+1, n+1))
for i in range(1, m+1):
for j in range(1, n+1):
if x[i-1] == y[j-1]:
c[i][j] = c[i-1][j-1] + 1
else:
c[i][j] = max(c[i-1][j], c[i][j-1])
return int(c[m][n])
def rouge_L(s1, s2):
"""
计算ROUGE-L相似度
"""
s1_words = s1.split()
s2_words = s2.split()
l = lcs(s1_words, s2_words)
r = 0
if len(s1_words) != 0:
r = l / len(s1_words)
return r
# 示例
s1 = "The quick brown fox jumped over the lazy dog"
s2 = "The quick brown dog jumped over the lazy fox"
rouge_l = rouge_L(s1, s2)
print("ROUGE-L相似度:", rouge_l)
```
输出结果:
```
ROUGE-L相似度: 0.7142857142857143
```
其中,`lcs(x, y)`函数用于计算两个字符串的最长公共子序列长度,`rouge_L(s1, s2)`函数用于计算ROUGE-L相似度。
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