import random
import string


def random_special_chars(strlen: int = 3) -> str:
    """
    Generate special chars

    >>> type(random_special_chars())
    <class 'str'>
    >>> all([True if char in string.punctuation else False for char in random_special_chars()])
    True
    >>> len(random_special_chars())
    3
    >>> len(random_special_chars(strlen=0))
    0
    >>> len(random_special_chars(strlen=1))
    1
    """
    return "".join([random.choice(string.punctuation) for _ in range(strlen)])