def query_dns(domain, record_type, cache=None, nameservers=None, timeout=2.0):
    """
    Queries DNS

    Args:
        domain (str): The domain or subdomain to query about
        record_type (str): The record type to query for
        cache (ExpiringDict): Cache storage
        nameservers (list): A list of one or more nameservers to use
        (Cloudflare's public DNS resolvers by default)
        timeout (float): Sets the DNS timeout in seconds

    Returns:
        list: A list of answers
    """
    domain = str(domain).lower()
    record_type = record_type.upper()
    cache_key = "{0}_{1}".format(domain, record_type)
    if cache:
        records = cache.get(cache_key, None)
        if records:
            return records

    resolver = dns.resolver.Resolver()
    timeout = float(timeout)
    if nameservers is None:
        nameservers = ["1.1.1.1", "1.0.0.1",
                       "2606:4700:4700::1111", "2606:4700:4700::1001",
                       ]
    resolver.nameservers = nameservers
    resolver.timeout = timeout
    resolver.lifetime = timeout
    if record_type == "TXT":
        resource_records = list(map(
            lambda r: r.strings,
            resolver.query(domain, record_type, tcp=True)))
        _resource_record = [
            resource_record[0][:0].join(resource_record)
            for resource_record in resource_records if resource_record]
        records = [r.decode() for r in _resource_record]
    else:
        records = list(map(
            lambda r: r.to_text().replace('"', '').rstrip("."),
            resolver.query(domain, record_type, tcp=True)))
    if cache:
        cache[cache_key] = records

    return records
def query_dns(domain, record_type, cache=None, nameservers=None, timeout=2.0):
    """
    Queries DNS

    Args:
        domain (str): The domain or subdomain to query about
        record_type (str): The record type to query for
        cache (ExpiringDict): Cache storage
        nameservers (list): A list of one or more nameservers to use
        (Cloudflare's public DNS resolvers by default)
        timeout (float): Sets the DNS timeout in seconds

    Returns:
        list: A list of answers
    """
    domain = str(domain).lower()
    record_type = record_type.upper()
    cache_key = "{0}_{1}".format(domain, record_type)
    if cache:
        records = cache.get(cache_key, None)
        if records:
            return records

    resolver = dns.resolver.Resolver()
    timeout = float(timeout)
    if nameservers is None:
        nameservers = ["1.1.1.1", "1.0.0.1",
                       "2606:4700:4700::1111", "2606:4700:4700::1001",
                       ]
    resolver.nameservers = nameservers
    resolver.timeout = timeout
    resolver.lifetime = timeout
    if record_type == "TXT":
        resource_records = list(map(
            lambda r: r.strings,
            resolver.query(domain, record_type, tcp=True)))
        _resource_record = [
            resource_record[0][:0].join(resource_record)
            for resource_record in resource_records if resource_record]
        records = [r.decode() for r in _resource_record]
    else:
        records = list(map(
            lambda r: r.to_text().replace('"', '').rstrip("."),
            resolver.query(domain, record_type, tcp=True)))
    if cache:
        cache[cache_key] = records

    return records
def query_dns ( domain , record_type , cache = None , nameservers = None , timeout = 2.0 ) : domain = str ( domain ) . lower ( ) record_type = record_type . upper ( ) cache_key = "{0}_{1}" . format ( domain , record_type ) if cache : records = cache . get ( cache_key , None ) if records : return records resolver = dns . resolver . Resolver ( ) timeout = float ( timeout ) if nameservers is None : nameservers = [ "1.1.1.1" , "1.0.0.1" , "2606:4700:4700::1111" , "2606:4700:4700::1001" , ] resolver . nameservers = nameservers resolver . timeout = timeout resolver . lifetime = timeout if record_type == "TXT" : resource_records = list ( map ( lambda r : r . strings , resolver . query ( domain , record_type , tcp = True ) ) ) _resource_record = [ resource_record [ 0 ] [ : 0 ] . join ( resource_record ) for resource_record in resource_records if resource_record ] records = [ r . decode ( ) for r in _resource_record ] else : records = list ( map ( lambda r : r . to_text ( ) . replace ( '"' , '' ) . rstrip ( "." ) , resolver . query ( domain , record_type , tcp = True ) ) ) if cache : cache [ cache_key ] = records return records
Queries DNS

    Args:
        domain (str): The domain or subdomain to query about
        record_type (str): The record type to query for
        cache (ExpiringDict): Cache storage
        nameservers (list): A list of one or more nameservers to use
        (Cloudflare's public DNS resolvers by default)
        timeout (float): Sets the DNS timeout in seconds

    Returns:
        list: A list of answers
Queries DNS