为什么我的代码会过滤掉我不要求它过滤的字符？(Why does my code filter out the characters I'm not asking it to filter?

为什么我的代码会过滤掉我不要求它过滤的字符？(Why does my code filter out the characters I'm not asking it to filter? (Python))

我只是要求我的代码过滤掉' - '和'+'，但它也过滤了'//'它不应该过滤掉。

任何人都知道它为什么这样做？

with open("some_file_1.txt") as f, open("some_file_2.txt") as g: flines = f.readlines() glines = g.readlines() d = difflib.Differ() diff = d.compare(flines, glines) with open('merged_tp.txt', 'w') as file_out: for line in diff: print line new_line = re.sub('[+-?]', '', line) file_out.write(new_line)

I've only asked my code to filter out '-' and '+', but it also filters out '//' which it should not.

Anyone have any idea why it does this?

with open("some_file_1.txt") as f, open("some_file_2.txt") as g: flines = f.readlines() glines = g.readlines() d = difflib.Differ() diff = d.compare(flines, glines) with open('merged_tp.txt', 'w') as file_out: for line in diff: print line new_line = re.sub('[+-?]', '', line) file_out.write(new_line)

最满意答案

字符集[+-?]表示“ +和?之间的任何字符”。

+有整数序数43. ? 具有整数序数63.范围43-63包括以下字符： +,-./0123456789:;<=>? 。/ +,-./0123456789:;<=>? <=> +,-./0123456789:;<=>?

字符集[+-]表示“要么+或- ”，我认为这就是你想要的。

The character set [+-?] means "any character between + and ?".

+ has the integer ordinal 43. ? has the integer ordinal 63. The range 43–63 includes the following characters: +,-./0123456789:;<=>?

The character set [+-] means "either + or -", which I think is what you want.