用于搜索额外反斜杠的正则表达式

Question

我有一个包含文件位置和地址的文本文件（例如%Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers\0\Hashes）

然而，对于其中一些我有多个反斜杠在一行，我想摆脱他们，并取代他们只有一个反斜杠。。是否有一个正则表达式可以用来标识所有额外的反斜杠（一行中不止一个）

Answer 1

您有机会查看python文档吗？ 你需要知道：

'*' Causes the resulting RE to match 0 or more repetitions of the preceding RE, as many repetitions as are possible. ab* will match ‘a’, ‘ab’, or ‘a’ followed by any number of ‘b’s.

'?' Causes the resulting RE to match 0 or 1 repetitions of the preceding RE. ab? will match either ‘a’ or ‘ab’.

'\' Either escapes special characters (permitting you to match characters like '*', '?', and so forth), or signals a special sequence. so to check '\' you need to put it as '\'. For example, to match a literal backslash, one might have to write '\\' as the pattern string, because the regular expression must be \, and each backslash must be expressed as \ inside a regular Python string literal.

如果您需要知道如何在python中使用regex： Python string.replace regular expression

Answer 2

试试这个：

\\{2,}

替换为：

\\

Demo

示例代码：

import re
regex = r"\\{2,}"
test_str = r"%Software\\Policies\\\\Microsoft\\Windows\\Safer\\CodeIdentifiers\\0\\Hashes\\"


subst = r"\\"
result = re.sub(regex, subst, test_str, 0)

if result:
    print (result)

Run it