Choice field for html created with pycountry v.1.5

chice_html.py

class Country_list(list):
    """'create choice for html form"""
    def __init__(self):
        self.lista_alpha = []
        self.lista_name = []
        self.choice = None

    def create_choices(self):
        t = list(pycountry.countries)
        for country in t:
            self.lista_alpha.append(country.alpha2)
            self.lista_name.append(country.name)
        self.choice = zip(self.lista_alpha, self.lista_name)
        return self.choice
        
        
countries = Country_list()
choices_class = countries.create_choices()


class PersonalForm(Form):
    country = SelectField('Country', choices=choices_class)