Name error error python regular expression grouping: unknown extension? P at position 4-CodePudding

Using a regular expression (? p . ) has been an error, error: unknown extension? P at position 4. Please call solution and error principle;

CodePudding user response:

Finally found the problem, just put? P now? P is ok, the problem was with a capital "P" cannot be lowercase

CodePudding user response:

P capital with respect to OK

CodePudding user response:

I also met, find the along while don't know, thank you very much

CodePudding user response:

Thank you, I also met for half a day, originally a capital p,