两个字符串（句子）之间的差异

Question

我试图计算两个句子之间的差异，如下所示：

import difflib

text1_lines = "I understand how customers do their choice. Difference"
text2_lines = "I understand how customers do their choice."
diff = difflib.ndiff(text1_lines, text2_lines)

我想要一个不同的

但我不明白。我做错什么了？谢谢你让我知道。在

Answer 1

使用简单的列表理解：

diff = [x for x in difflib.ndiff(text1_lines, text2_lines) if x[0] != ' ']

它会给你看删节和附录

输出：

^{pr2}$

（后面带负号的所有内容都被删除）

相反，切换text1_lines和text2_lines会产生这样的结果：

['+  ', '+ D', '+ i', '+ f', '+ f', '+ e', '+ r', '+ e', '+ n', '+ c', '+ e']

要删除标志，可以转换以上列表：

diff_nl = [x[2] for x in diff]

要完全转换为字符串，只需使用.join()：

diff_nl = ''.join([x[2] for x in diff])

Answer 2

把大的绳子和小的绳子分开，你就会得到不同的结果。在

if len(a) == 0:
   print b
   return
if len(b) == 0:
   print a
   return
if len(a)>len(b): 
   res=''.join(a.split(b))             #get diff
else: 
   res=''.join(b.split(a))             #get diff

print(res.strip())     

Answer 3

从Docs：

import difflib
import sys

text1_lines = "I understand how customers do their choice. Difference"
text2_lines = "I understand how customers do their choice."
diff = difflib.context_diff(text1_lines, text2_lines)
for line in diff:
    sys.stdout.write(line)

输出：

^{pr2}$