i dont get it, is __int__, __float__, __init__, and__name__ names or variavles name or they have they own use??

Variable names with a double-underscore prefix and suffix are typically reserved for built-in Python object attributes and methods and each has a special purpose.

As mentioned in PEP 8:

__double_leading_and_trailing_underscore__: "magic" objects or attributes that live in user-controlled namespaces. E.g. __init__, __import__ or __file__. Never invent such names; only use them as documented.

As for your list:

• __int__: name of class method called when class instance issued in an integer context
• __float__: name of class method called when class instance issued in an float context
• __init__: name of class method called to initialize a class instance after it has been created
• __name__: an object attribute containing the string name of the object. see below

>>> def foo():
...     pass
... 
>>> foo
<function foo at 0x7ffa6241ba60>
>>> f = foo
>>> f
<function foo at 0x7ffa6241ba60>
>>> f.__name__
'foo'

Post back if you need more help. Good luck!!