python-projects/courses/python_oo_programming/section_04.py at main · mungitoperrito/python-projects · GitHub

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# # Protected, but only by convention
# class User:
#     def __init__(self, username, email, password):
#         self.username = username
#         self._email = email
#         self.password = password

#     def clean_email(self):
#        return self._email.lower().strip()

# user_01 = User("Dave", "aaa@corp.com", "abc")
# user_02 = User("Bob", "  BBB@corp.com ", "abc")

# for u in [user_01, user_02]:
#   print(u._email)           # Breaks convention, but works
#   print(u.clean_email())    # Expected way


# Actually protected (Private), use double underscore
class User:
    def __init__(self, username, email, password):
        self.username = username
        self.__email = email
        self.password = password

    def clean_email(self):
       return self.__email.lower().strip()

user_01 = User("Dave", "aaa@corp.com", "abc")
user_02 = User("Bob", "  BBB@corp.com ", "abc")

for u in [user_01, user_02]:
  # print(u.__email)          # Doesn't work
  print(u.clean_email())    # Expected way