declare class python
# To create a simple class:
class Shape:
def __init__():
print("A new shape has been created!")
pass
def get_area(self):
pass
# To create a class that uses inheritance and polymorphism
# from another class:
class Rectangle(Shape):
def __init__(self, height, width): # The constructor
super.__init__()
self.height = height
self.width = width
def get_area(self):
return self.height * self.widthpython class
class Dog(object):
def __init__(self, name, age):
self.name = name
self.age = age
def speak(self):
print("Hi I'm ", self.name, 'and I am', self.age, 'Years Old')
JUB0T = Dog('JUB0T', 55)
Friend = Dog('Doge', 10)
JUB0T.speak()
Friend.speak()class methods parameters python
class Foo (object):
# ^class name #^ inherits from object
bar = "Bar" #Class attribute.
def __init__(self):
# #^ The first variable is the class instance in methods.
# # This is called "self" by convention, but could be any name you want.
#^ double underscore (dunder) methods are usually special. This one
# gets called immediately after a new instance is created.
self.variable = "Foo" #instance attribute.
print self.variable, self.bar #<---self.bar references class attribute
self.bar = " Bar is now Baz" #<---self.bar is now an instance attribute
print self.variable, self.bar
def method(self, arg1, arg2):
#This method has arguments. You would call it like this: instance.method(1, 2)
print "in method (args):", arg1, arg2
print "in method (attributes):", self.variable, self.bar
a = Foo() # this calls __init__ (indirectly), output:
# Foo bar
# Foo Bar is now Baz
print a.variable # Foo
a.variable = "bar"
a.method(1, 2) # output:
# in method (args): 1 2
# in method (attributes): bar Bar is now Baz
Foo.method(a, 1, 2) #<--- Same as a.method(1, 2). This makes it a little more explicit what the argument "self" actually is.
class Bar(object):
def __init__(self, arg):
self.arg = arg
self.Foo = Foo()
b = Bar(a)
b.arg.variable = "something"
print a.variable # something
print b.Foo.variable # Fooclass python
class A: # define your class A
.....
class B: # define your class B
.....
class C(A, B): # subclass of A and B
obj = C() #to create instance
# issubclass(sub, sup) boolean function returns true if the given
# subclass sub is indeed a subclass of the superclass sup
# isinstance(obj, Class) boolean function returns true if obj is an
# instance of class Class or is an instance of a subclass of ClassCopyright © 2021 Codeinu
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