The Python Object Model
OR
The Python Data Model
Everything is Data
Everything is data is data
Everything is data is data is data
You know where this is going
You know where this is going is
wait for it...
Everything is data is data is data is data
Data
Interpreters
- Data is 'meaningless' without some kind of system that it means something to
- In CS, we have the Turing Machine (bless his soul)
- Machines are models that understand a particular kind of data - specified by a formal grammar and can operate on this 'correct' data
But what is meaning?
The Turing Machine
- Daniel, don't spend time talking about the Turing machine
Python
So Python is one of such (not so) abstract machines that accepts a strictly defined grammar (what we call syntax) and has a set of instructions it applies to data that conforms to this grammar.
>>> 2 + 2
4
>>> def freedom():
print(42)
>>> def 1984
SyntaxError: invalid syntaxThe Python Object Model
Objects are Python’s abstraction for data.
Every object has an identity, a type and a value.
The value of some objects can change. Objects whose value can change are said to be mutable; objects whose value is unchangeable once they are created are called immutable.
An object’s type determines the operations that the object supports.
Objects are never explicitly destroyed; however, when they become unreachable they may be garbage-collected.
The Python Object Model
All data in a Python program is represented by objects or by relations between objects.
Special Methods
__init__
__del__
__repr__
__str__
__bytes__
__bool__
__getattr__
__add__
__mul__In this talk, we are going to focus on Python's "magic" methods that give us access to built-in operations.
Special Methods
Special Methods
Code Lab
git clone https://github.com/letroot/object-model.gitThe Python Object Model
By Daniel Adeyemo
The Python Object Model
He was too sleepy to fill in a description that night, something about Python and objects I think.
