Generate a function that checks if a list of value is in the interval

Interval tester.py

import re


def parse_interval_rule(symbols, num):
    match symbols:
        case '[':
            return lambda n: n >= num
        case '(':
            return lambda n: n > num
        case ']':
            return lambda n: n <= num
        case ')':
            return lambda n: n < num


def interval(interval_str):
    """
    Generate a function that checks if a list of value is in the interval
    Input interval_str in math notation ie '[min' 'max]', '(min', 'max]' '[min, max]' '(min, max)' '(min, max]' '[min, max)'
    Return a function that checks if all value is in the interval else raise an error
    """
    rules = []
    for items in re.finditer(r'([\[\]()])?\s*([\d.]+)\s*([\[\]()])?', interval_str):
        num = float(items.group(2))
        if s := items.group(1):
            rules.append(parse_interval_rule(s, num))
        if e := items.group(3):
            rules.append(parse_interval_rule(e, num))

    def check_interval(xs):
        for rule in rules:
            for x in xs:
                if not rule(x):
                    raise ValueError(f'value {x} must be in the interval {interval_str}')
    return check_interval


if __name__ == '__main__':
    test = interval('(100,200)')
    test([150])  # pass
    test([100])  # fail