Countries without Postal Code, ISO Code, Python

country_extension.py

# https://en.wikipedia.org/wiki/List_of_postal_codes
# http://www.geopostcodes.com/data

class NoPostalCodeCountries(object):
    _countries = {
        "AO": "Angola",
        "AG": "Antigua and Barbuda",
        "AW": "Aruba",
        "BS": "Bahamas",
        "BZ": "Belize",
        "BJ": "Benin",
        "BM": "Bermuda",
        "BO": "Bolivia, Plurinational State of",
        "BQ": "Bonaire, Sint Eustatius and Saba",
        "BW": "Botswana",
        "BF": "Burkina Faso",
        "BI": "Burundi",
        "CM": "Cameroon",
        "CF": "Central African Republic",
        "TD": "Chad",
        "KM": "Comoros",
        "CG": "Congo",
        "CD": "Congo, the Democratic Republic of the",
        "CK": "Cook Islands",
        "CI": u"C\xf4te d'Ivoire",
        "CW": u"Cura\xe7ao",
        "DJ": "Djibouti",
        "DM": "Dominica",
        "GQ": "Equatorial Guinea",
        "ER": "Eritrea",
        "FJ": "Fiji",
        "TF": "French Southern Territories",
        "GA": "Gabon",
        "GM": "Gambia",
        "GH": "Ghana",
        "GD": "Grenada",
        "GY": "Guyana",
        "HM": "Heard Island and McDonald Islands",
        "HK": "Hong Kong",
        # "IE": "Ireland", # Ireland came up with Postal code in 13th July 2015(Eircode) but not for whole region?
        "KI": "Kiribati",
        "KP": "Korea, Democratic People's Republic of",
        "LY": "Libya",
        "MO": "Macao",
        "MW": "Malawi",
        "ML": "Mali",
        "MR": "Mauritania",
        "NR": "Nauru",
        "NL": "Netherlands",
        "AN": "Netherlands Antilles",
        "NU": "Niue",
        "QA": "Qatar",
        "RW": "Rwanda",
        "KN": "Saint Kitts and Nevis",
        "ST": "Sao Tome and Principe",
        "SC": "Seychelles",
        "SL": "Sierra Leone",
        "SX": "Sint Maarten (Dutch part)",
        "SB": "Solomon Islands",
        "SO": "Somalia",
        "SR": "Suriname",
        "SY": "Syria",
        "TL": "Timor-Leste",
        "TG": "Togo",
        "TK": "Tokelau",
        "TO": "Tonga",
        "TT": "Trinidad and Tobago", # Planned but not implemented
        "TV": "Tuvalu",
        "UG": "Uganda",
        "AE": "United Arab Emirates",
        "VU": "Vanuatu",
        "YE": "Yemen",
        "ZW": "Zimbabwe"
    }
    @classmethod
    def country_codes(cls):
        return cls._countries.keys()

Netherlands have postal codes so please remove it from this list.
https://en.wikipedia.org/wiki/Postal_codes_in_the_Netherlands