python - 如何用颜色显示两个字符串序列的差异？

Question

我正在尝试寻找一种 Python 方法来区分字符串。我知道 difflib 但我一直没能找到一个内联模式来做类似于 this JS library 的事情。做(绿色插入，红色删除):

one_string =   "beep boop"
other_string = "beep boob blah"

有什么办法可以实现吗？

Answer 1

一种可能的方式(另见@interjay 对 OP 的评论)是

import difflib

red = lambda text: f"\033[38;2;255;0;0m{text}\033[38;2;255;255;255m"
green = lambda text: f"\033[38;2;0;255;0m{text}\033[38;2;255;255;255m"
blue = lambda text: f"\033[38;2;0;0;255m{text}\033[38;2;255;255;255m"
white = lambda text: f"\033[38;2;255;255;255m{text}\033[38;2;255;255;255m"

def get_edits_string(old, new):
    result = ""
    codes = difflib.SequenceMatcher(a=old, b=new).get_opcodes()
    for code in codes:
        if code[0] == "equal": 
            result += white(old[code[1]:code[2]])
        elif code[0] == "delete":
            result += red(old[code[1]:code[2]])
        elif code[0] == "insert":
            result += green(new[code[3]:code[4]])
        elif code[0] == "replace":
            result += (red(old[code[1]:code[2]]) + green(new[code[3]:code[4]]))
    return result

这仅取决于 difflib，并且可以用

进行测试

one_string =   "beep boop"
other_string = "beep boob blah"

print(get_edits_string(one_string, other_string))