如何使用python比较两个html文件并仅显示新html文件中的差异

Question

I have used difflib but the html_table line is taking forever to execute.

import difflib

html_1 = data1
html_2 = data2

htmldiff = difflib.HtmlDiff()
html_table = htmldiff.make_table([html_1], [html_2])

I have tried htmldiffer but it is giving me ValueError: stat: path too long for Windows

from htmldiffer import diff

str_a = data1
str_b = data2
d = diff.HTMLDiffer(data1, data2)

print(d.combined_diff)

I have tried htmltreediff it is giving NameError: name 'basestring' is not defined

from htmltreediff import diff
print (diff(data1, data2 , pretty=True))

Answer 1

This is how to make long file paths available on windows: https://www.howtogeek.com/266621/how-to-make-windows-10-accept-file-paths-over-260-characters/

CPython issues related to difflib:

• http://bugs.python.org/issue6931 : dreadful performance in difflib: ndiff and HtmlDiff http://bugs.python.org/issue11740 : difflib html diff takes extremely long

Solution for long chunks would be to split them into smaller parts and process separately. This way quadratic time will be smaller and we still can benefit from _fancy_helper logic.

htmltreediff - does not support python 3