Constructors in Python [closed]

Answer 1

class MyClass(object):
  def __init__(self, x, y, angle):
    self.x = x
    self.y = y
    self.angle = angle

The constructor is always written as a function called __init__(). It must always take as its first argument a reference to the instance being constructed. This is typically called self. The rest of the arguments are up to the programmer.

The object on the first line is the superclass, i.e. this says that MyClass is a subclass of object. This is normal for Python class definitions.

You access fields (members) of the instance using the self. syntax.

Answer 2

class MyClass(SuperClass):
    def __init__(self, *args, **kwargs):
        super(MyClass, self).__init__(*args, **kwargs)
        # do initialization

Answer 3

See the Python tutorial.

Answer 4

Constructors are declared with __init__(self, other parameters), so in this case:

def __init__(self, x, y, angle):
    self.x = x
    self.y = y
    self.angle = angle

You can read more about this here: Class definition in python