PEP 501 has a very, very brief discussion of this. I'm pretty sure there was a discussion at the time about user-defined string prefixes, but since there's a lot of discussion about the inter-related PEPs 498, 501, and 502, it's hard to find the exact discussion of custom string prefixes in python-dev or python-ideas. But, if you're serious about this proposal, you should find those existing conversations and try to address their objections. Eric On 7/1/2020 2:45 AM, artem6191 wrote:

This will be helpful for python linters, own data types, etc. Example:

class SQL_String(str): @property def __chr__(self): # SQL_string.__chr__ will return string that need to be before string start return 's' def __check__(self): # This method will be called by intepreter to check if string is OK if not str(self).endswith(';'): # For example, we want to make that this string always needed to ends with ";" raise SyntaxError('Missing ";" at the end of string') else: return True

my_sql_string = s'SELECT * FROM information_schema.tables' # SyntaxError my_sql_string_2 = s'SELECT * FROM information_schema.tables;' # all is ok _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/T3B56I... Code of Conduct: http://python.org/psf/codeofconduct/