如何发现我在Python中的错误？

Question

Write a class named Person with data attributes for a person's name, address, and telephone number. Next, write a class named Customer that is a subclass of the Person class.

The Customer class should have a data attribute for a customer number and a Boolean data attribute indicating whether the customer wishes to be on a mailing list. Demonstrate an instance of the Customer class in a simple program.'

This is what I have for my code, but I keep getting the following error:

Traceback (most recent call last):
  File "/Users/ryanraben/Desktop/person1.py", line 45, in <module>
    import customer
ModuleNotFoundError: No module named 'customer'

I have been struggling with this class this semester. I found someone asking a similar question here in Stack Overflow but their code was very different than what I had (and if I copied their code I still could not get the correct results). This was a video module and I entered my code as it appeared on the instructor's screen, but obviously I didn't do it right because his code works and mine does not.

class Person:
    def __init__(self, name, address, phone):
        self.__name = name
        self.__address = address
        self.__phone = phone

    def set_name (self, name):
        self.__name = name

    def set_address (self, address):
        self.__address = address

    def set_phone (self, phone):
        self.__phone = phone

    def get_name (self):
        return self.__name

    def get_address (self):
        return self.__address

    def get_phone (self):
        return self.__phone

class Customer (Person):
    def __init__(self, name, address, phone, customer_number, mailing_list):
        Person.__init__(self, name, adress, phone)
        self.__customer_number = customer_number
        self.__mailing_list = mailing_list

    def set_customer_number (self, customer_number):
          self.__customer_number = customer_number

    def set_mailing_list(self, mailing_list):
          self.__mailing_list = mailing_list

    def get_customer_number(self):
        return self.__customer_number

    def get_mailing_list (self):
        return self.__mailing_list



import customer

name = input ('Name: ') 
address = input ('Address: ')
phone = input ('Phone: ')
customer_number = input ('Customer number: ')
mail = input ('Include in mailing list? (y/n): ')

if mail.lower()=='y':
    mailing_list = True
else:
    mailing_list = False

my_customer = customer.Customer (name, address, phone, customer_number, mailing_list)    

print ('Customer Information')
print ('-----------------------------')
print ('Name: ', my_customer.get_name())
print ('Address: ', my_customer.get_address())
print ('Phone: ', my_customer.get_phone())
print ('Customer number: ', my_customer.get_customer_number())
print ('Mailing list: ', my_customer.get_mailing_list())

Answer 1

This is a pretty common error:

You're attempting to import the library of customer and your IDE is simply not able to find this file.

Since you're defining the Class Customer I can't see any reason why you would need to import this non-existant library.

Consequently, I suggest you delete the line import customer .

That is unless I've misunderstood something.