Function is_ipaddress

src/urllib3/util/ssl_.py:437–447

Detects whether the hostname given is an IPv4 or IPv6 address. Also detects IPv6 addresses with Zone IDs. :param str hostname: Hostname to examine. :return: True if the hostname is an IP address, False otherwise.

(hostname: str | bytes)

def is_ipaddress(hostname: str | bytes) -> bool:
    """Detects whether the hostname given is an IPv4 or IPv6 address.
    Also detects IPv6 addresses with Zone IDs.

    :param str hostname: Hostname to examine.
    :return: True if the hostname is an IP address, False otherwise.
    """
    if isinstance(hostname, bytes):
        # IDN A-label bytes are ASCII compatible.
        hostname = hostname.decode("ascii")
    return bool(_IPV4_RE.match(hostname) or _BRACELESS_IPV6_ADDRZ_RE.match(hostname))


def _is_key_file_encrypted(key_file: str) -> bool: