Is it possible to type-hint a compiled regex in python?
Question:
I would like to use autocompletion for a pre-compiled and stored list of regular expressions, but it doesn’t appear that I can import the _sre.SRE_Pattern class, and I can’t programmatically feed the obtained type from type() to a comment of the format # type: classname or use it for a return -> classname style hint
Is there a way to explicitly import a class from the _sre.c thing?
Answers:
You should use typing.Pattern and typing.Match which were specifically added to the typing module to accommodate this use case.
Example:
from typing import Pattern, Match
import re
my_pattern = re.compile("[abc]*") # type: Pattern[str]
my_match = re.match(my_pattern, "abbcab") # type: Match[str]
print(my_match)
I would like to use autocompletion for a pre-compiled and stored list of regular expressions, but it doesn’t appear that I can import the _sre.SRE_Pattern class, and I can’t programmatically feed the obtained type from type() to a comment of the format # type: classname or use it for a return -> classname style hint
Is there a way to explicitly import a class from the _sre.c thing?
You should use typing.Pattern and typing.Match which were specifically added to the typing module to accommodate this use case.
Example:
from typing import Pattern, Match
import re
my_pattern = re.compile("[abc]*") # type: Pattern[str]
my_match = re.match(my_pattern, "abbcab") # type: Match[str]
print(my_match)