What should I add or what other way is there?-CodePudding

I have a dictionary:

test1 = {"SN": "SN: abc123\r\nMAC: 10:ab:cd:30:5C:7C\r\n01-04-2022 Замена"}

I wrote a regular expression in the code:

name_match_3 = re.search(r"(\r\n. )", test1.get("SN"), flags=re.DOTALL)
dict_miner_regular["Comment"] = (name_match_3.group(1) if name_match_3 else None)

As a result, I'm getting:

result_2 = {"Comment": "MAC: 10:ab:cd:30:5C:7C\r\n01-04-2022 Замена"}

But I also need to remove MAC: 10:ab:cd:30:5C:7C. But it's not everywhere.

As a result, it is necessary to remove SN: and MAC:

result_3 = {"Comment": "01-04-2022 Замена"}

I understand that something needs to be added here --> r"(\r\n. )"

CodePudding user response：

If SN and MAC are always directed at the start of a string, then use

\r\n(. )$

Python Example

import re

test = {"SN": "SN: abc123\r\nMAC: 10:ab:cd:30:5C:7C\r\n01-04-2022 Замена"}
match = re.search(r"\r\n(. )$", test.get("SN"))
result = {"Comment": match.group(1) if match else None}  # {'Comment': '01-04-2022 Замена'}

Edit

Otherwise, you can use the following regex

(?:^|\r\n)((?:(?!SN|MAC|\r\n).) )

You can add other keys next to SN and MAC as well.

See the regex demo

CodePudding user response：

if it you need element after last \r\n then you can do it with split() and [-1] without regex

result = {"Comment": test1["SN"].split("\r\n")[-1] }

Full example

test1 = {"SN": "SN: abc123\r\nMAC: 10:ab:cd:30:5C:7C\r\n01-04-2022 Замена"}
lines = test1["SN"].split("\r\n")
result = {"Comment": lines[-1] }
print(result)

Result:

{'Comment': '01-04-2022 Замена'}

EDIT:

If you may have more elements with \r\n then you may split() to lines, and later filter lines which not start with SN: nor MAC: and later join() rest of lines into string again.

I added \r\nOtherText to example data

test1 = {"SN": "SN: abc123\r\nMAC: 10:ab:cd:30:5C:7C\r\n01-04-2022 Замена\r\nOtherText"}
lines = test1["SN"].split("\r\n")
lines = [line for line in lines if not line.startswith(('SN:', 'MAC:'))]
text = "\r\n".join(lines)
result = {"Comment": text }
print(result)