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Code: Alles auswählen

class Contact:
    all_contacts = []

    def __init__(self, name, email):
        self.name = name
        self.email = email
        Contact.all_contacts.append(self)


class MailSender:
    def send_email(self, message):
        print("Sending mail to ", self.email)
        # Add code logic here


class EmailableContact(Contact, MailSender):
    pass

Code: Alles auswählen

class Contact:
	all_contacts = []
	def __init__(self, name, email):
		self.name = name
		self.email = email
		Contact.all_contacts.append(self)

Code: Alles auswählen

class Supplier(Contact):
	def order(self, order):
		print("If this were a real system we would send "
			"'{}' order to '{}'".format(order, self.name))

Code: Alles auswählen

class ContactList(list):
	def search(self, name):
		'''Return all contacts that contain the search value
		in their name.'''
		matching_contacts = []
		for contact in self:
			if name in contact.name:
				matching_contacts.append(contact)
		return matching_contacts
		
class Contact:
	all_contacts = ContactList()
	def __init__(self, name, email):
	....

Code: Alles auswählen

class ContactList(list):
    pass

a = ContactList([1,2,3])
b = ContactList([7,6,8])
print(a + b)
# [1, 2, 3, 7, 6, 8]
print(type(a), type(b), type(a + b))
# <class '__main__.ContactList'>, <class '__main__.ContactList'>, <type 'list'>

Code: Alles auswählen

class RequestHandler(object):
    """Base class for HTTP request handlers.

    Subclasses must define at least one of the methods defined in the
    "Entry points" section below.
    """
    SUPPORTED_METHODS = ("GET", "HEAD", "POST", "DELETE", "PATCH", "PUT",
                         "OPTIONS")

    _template_loaders = {}  # type: typing.Dict[str, template.BaseLoader]
    _template_loader_lock = threading.Lock()
    _remove_control_chars_regex = re.compile(r"[\x00-\x08\x0e-\x1f]")

    def __init__(self, application, request, **kwargs):
        super(RequestHandler, self).__init__()

        self.application = application
        self.request = request
        ...

Code: Alles auswählen

class A:
    def __init__(self):
        print("A has been called.")
        super().__init__()


class B(A):
    def __init__(self):
        print("B has been called.")
        super().__init__()


class C(B):
    def __init__(self):
        print("C has been called.")
        super().__init__()


c = C()

Code: Alles auswählen

class A:
    def __init__(self):
        print("A has been called.")


class B:
    def __init__(self):
        print("B has been called.")


class C(A, B):
    def __init__(self):
        print("C has been called.")
        super().__init__()


c = C()

Code: Alles auswählen

class BaseClass:
    num_base_calls = 0

    def call_me(self):
        print(4)
        print("Calling method on Base Class")
        self.num_base_calls += 1


class LeftSubClass(BaseClass):
    num_left_sub_calls = 0

    def call_me(self):
        print(3)
        super().call_me()
        print("Calling method on Left Sub Class")
        self.num_left_sub_calls += 1


class RightSubClass(BaseClass):
    num_right_sub_calls = 0

    def call_me(self):
        print(2)
        super().call_me()
        print("Calling method on Right sub Class")
        self.num_right_sub_calls += 1


class SubClass(LeftSubClass, RightSubClass):
    num_sub_calls = 0

    def call_me(self):
        print(1)
        super().call_me()
        print("Calling method on Sub Class")
        self.num_sub_calls += 1


s = SubClass()
s.call_me()

print("base: ", s.num_base_calls)
print("left sub: ", s.num_left_sub_calls)
print("right sub: ", s.num_right_sub_calls)
print("sub: ", s.num_sub_calls)

Code: Alles auswählen

class A:
    def __init__(self, a1, a2, *args, **kwargs):
        print("A has been called.")
        super().__init__(*args, **kwargs)
        self.a1 = a1
        self.a2 = a2

class B:
    def __init__(self, b1, b2, *args, **kwargs):
        print("B has been called.")
        super().__init__(*args, **kwargs)
        self.b1 = b1
        self.b2 = b2


class C(A, B):
    def __init__(self, a1, a2, b1, b2, c1, c2, *args, **kwargs):
        super().__init__(a1, a2, b1, b2, *args, **kwargs)
        self.c1 = c1
        self.c2 = c2


c = C(1, 2, 3, 4, 5, 6)
print(c.a1, c.a2, c.b1, c.b2, c.c1, c.c2)