PyCi

class my_types:
    def __init__(self):
        self.my_types = [email_type, negotive_type, positive_type]

    def check_types(self, check_type):
        for my_type in self.my_types:
            obj = my_type()
            if obj.check_type(check_type):
                return obj.type_name()
        return "Unknown type"

class email_type(my_types):
    def check_type(self, check_type):
        if "@" in check_type:
            return True
        return False

    def type_name(self):
        return "email_type"

class negotive_type(my_types):
    def check_type(self, check_type):
        if "no" in check_type:
            return True
        return False

    def type_name(self):
        return "negotive_type"

class positive_type(my_types):
    def check_type(self, check_type):
        if "yes" in check_type:
            return True
        return False

    def type_name(self):
        return "positive_type"


check_types = ["test@", "yes", "no"]

obj = my_types()
for check_type in check_types:
    print("{} - {}".format(check_type, obj.check_types(check_type)))

test@ - email_type
yes - positive_type
no - negotive_type