RegExp

Python equivalents of JavaScript RegExp type.

jstypes.JSRegExp

jstypes.JSRegExp(self, source: str, flags: JSRegExpFlag = JSRegExpFlag.NoFlag)

The data represented by a JavaScript RegExp.

Note that while Python and JavaScript Regular Expressions are similar, they each have features and syntax not supported by the other. Simple expressions will work the same in both languages, but this is not the case in general.

JSRegExp does not support matching text with the RegExp, but as_python_pattern() can work for patterns that use compatible syntax and flags.

Attributes

Name	Description
flags
source

Methods

Name	Description
as_python_pattern	Naively compile the JavaScript RegExp as a Python re.Pattern.
from_python_pattern	Naively create a JSRegExp with an un-translated Python re.Pattern.

as_python_pattern

jstypes.JSRegExp.as_python_pattern(throw: bool = True)

Naively compile the JavaScript RegExp as a Python re.Pattern.

The pattern may fail to compile due to syntax incompatibility, or may compile but behave incorrectly due to differences between Python and JavaScript’s regular expression support.

from_python_pattern

jstypes.JSRegExp.from_python_pattern(
    pattern: re.Pattern[AnyStr],
    throw: bool = True,
)

Naively create a JSRegExp with an un-translated Python re.Pattern.

As with as_python_pattern() this can result in JSRegExp objects that won’t behave on the JavaScript side in the same way as in Python.

This can fail if the Python pattern has re.VERBOSE set, as there’s no equivalent JavaScript flag.