import re


def isURL(s):
    """Checks if the given string is a valid http/https url.

    # Arguments
        s: Input string, can be a url

    # Returns
        bool value stating whether the given string is a url
    """
    url = re.compile("""http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\), ]|
                        (?:%[0-9a-fA-F][0-9a-fA-F]))+""")
    return bool(url.match(s))