Replace a set of characters with a string containing that character and some other characters, in that string using Regex

Question

Say I have a string - [H*la.Am!go] and I want to replace all the characters specified in the character set with that character appended after "\"

Character set- ['_', '*', '[', ']', '(', ')', '~', '`', '>', '#', '+', '-', '=', '|', '{', '}', '.', '!','\']

So the output would be -

\\[H\\*la\\.Am\\!go\\]

I can go about doing this chaining replace() method like so:

str.replace('[','\\[').replace('_','\\_')...

But this searches the string repeatedly for characters, thereby inefficient and also the code isn't clean.

Could someone help me out in implementing the regex replacement for this please?

Your “character set” is almost but not quite the Regex metacharacters, and `\\` is the Regex escape character. Are you trying to [escape metacharacters in a Regex](https://stackoverflow.com/questions/3561493/)? If you are [you should have told us that](https://meta.stackexchange.com/questions/66377/). — Dour High Arch, Jun 09 '20 at 00:51
@DourHighArch Thank you for your reply, and the suggested answer works fine for my case, except a few characters which needed to be added. Actually these are the characters that need to be escaped when using **MarkdownV2** in telegram bot-development. — jasondoyle121, Jun 09 '20 at 04:21

0 Answers0