PowerPoint

Python data ModelMoon Yong Joon1

1. 2. 3. ABC

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1. Moon Yong Joon3

Moon Yong Joon4

Meta Class5

. type 6

Instance ofInstance of

type type , tuple, namespace dict 7 type(,,namespace)

: type class 8

: class 9

Type class 10

type type 11

type : type 12['Camembert'] {'x': 42, '__module__': '__main__', '__doc__': None, 'howdy': , '__dict__': , '__weakref__': } 42 Howdy, John

class Moon Yong Joon13

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metaclass type class

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metaclass type A

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namespace 17

type namespaceOnce the appropriate metaclass has been identified, then the class namespace is prepared. 18__prepare__(,)

type namespace type __prepare__ namespace 19

Metaclass namespace metaclass namespace classmethod 20namespace = metaclass.__prepare__(name, bases, **kwds)

object21

body . exec(body, globals(), namespace) 22

object Once the class namespace has been populated by executing the class body,

the class object is created by calling metaclass(name, bases, namespace, **kwds) 23

meta classMoon Yong Joon24

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: type Meta type.__new__ 26

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Meta metaclass A 28

: A Meta A namespace A 29the appropriate metaclass is determined ==>

the class namespace is prepared ===> {'__init__': , '__doc__': None, 'four': , '__dict__': , ' abc': 'abc', 'two': , '__weakref__': , '__module__': '__main__', 'three': , 'one': }

Moon Yong Joon30

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Type Class type 32

Object Class Object Class class instance 33

Class Class class instance 34

Meta Class Meta Class class instance 35

2.

Moon Yong Joon36

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abc.ABCMeta 38

Instance ofInstance of

abc.ABCMeta metaclass type 39

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abc.ABC class 41

abc.ABC 42

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abc.ABCMeta metaclass MyABC MyCon MyABC 44

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abc.ABCMeta metaclass MyABC register class 46

: 47

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register 49

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abc abstractmethod, abstractclassmethod, abstractstaticmethod, abstractproperty 51

decorator 52 @abstractmethod def (self, ) : @abstractclassmethod def (cls, ) : @abstractstaticmethod def ( ) :

abstractmethod 53

: abc abstractmethod instance method 54

: abc abstractmethod 55

/ 56

abc abstractclassmethod /abstractstaticmethod 57

58

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property decorator 60 @abstractproperty def (self, ) :

abstractproperty abstractproperty property 61

Abstractmethod abstractmethod property 62

3. ABCMoon Yong Joon63

Number Moon Yong Joon64

Number 65

numbers numbers 66

['ABCMeta', 'Complex', 'Integral', 'Number', 'Rational', 'Real', '__all__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'abstractmethod']

numbers numbers 67

Number check68

Number issubclass Numbers 69

Number isinstance instance Numbers instance 70

collections.ABC Moon Yong Joon71

collection 72

collections.abc collections.abc ,, dict, set 73['AsyncIterable', 'AsyncIterator', 'Awaitable', 'ByteString', 'Callable', 'Container', 'Coroutine', 'Generator', 'Hashable', 'ItemsView', 'Iterable', 'Iterator', 'KeysView', 'Mapping', 'MappingView', 'MutableMapping', 'MutableSequence', 'MutableSet', 'Sequence', 'Set', 'Sized', 'ValuesView', ]

collections.abc diagram collections.abc class diagram74

Fluent python

collections.abc 75ABCInherits fromAbstract MethodsMixin MethodsContainer__contains__Hashable__hash__Iterable__iter__IteratorIterable__next__ __iter__GeneratorIteratorsend,throw close,__iter__,__next__Sized__len__Callable__call__SequenceSized,Iterable,Container__getitem__,__len__ __contains__,__iter__,__reversed__, index, andcountMutableSequenceSequence__getitem__,__setitem__,__delitem__,__len__,insert InheritedSequence methods and append,reverse,extend, pop,remove, and__iadd__ByteStringSequence__getitem__,__len__ InheritedSequence methods

collections.abc 76ABCInherits fromAbstract MethodsMixin MethodsSetSized,Iterable,Container__contains__,__iter__,__len__ __le__,__lt__,__eq__,__ne__, __gt__,__ge__,__and__, __or__,__sub__,__xor__, andisdisjointMutableSetSet__contains__,__iter__,__len__,add,discard InheritedSet methods andclear, pop,remove,__ior__,__iand__, __ixor__, and__isub__MappingSized,Iterable,Container__getitem__,__iter__,__len__ __contains__,keys,items,values, get,__eq__, and__ne__MutableMappingMapping__getitem__,__setitem__,__delitem__,__iter__,__len__ InheritedMappingmethods and pop,popitem,clear,update, andsetdefaultMappingViewSized __len__ItemsViewMappingView,Set __contains__,__iter__KeysViewMappingView,Set __contains__,__iter__ValuesViewMappingView __contains__,__iter__

collections.abc 77ABCInherits fromAbstract MethodsMixin MethodsAwaitable__await__CoroutineAwaitablesend,throw closeAsyncIterable__aiter__AsyncIteratorAsyncIterable__anext__ __aiter__

class78

classContainer/Hashable/Sized/Iterable/Callable 79ABCAbstract MethodsContainer__contains__Hashable__hash__Iterable__iter__Sized__len__Callable__call__

class Container/Hashable/Sized/Iterable/Callable 80

Iterator/Generator 81

Iterator/Generator Iterator Iterable Generator Iterator 82

Iterator sequence iter() itoractor

83

Iterator Iterator class 84

iterable iterator Container iterable iterator 85

SEQUENCE 86

SEQUENCE class87ABCInherits fromAbstract MethodsMixin MethodsContainer__contains__Iterable__iter__Sized__len__Callable__call__SequenceSized,Iterable,Container__getitem__,__len__ __contains__, __iter__, __reversed__, index, andcountMutableSequenceSequence__getitem__,__setitem__,__delitem__,__len__,insert InheritedSequence methods and append,reverse,extend, pop,remove, and__iadd__ByteStringSequence__getitem__,__len__ InheritedSequence methods

Sequence class diagram Sequence class diagram 88

Fluent python

Sequence Sized, Iterabel, Container {'__iter__', '__len__', '__contains__'} 89

(, , ) {'__iter__', '__len__', '__contains__'}

Sequence Sequence 90(, , ){'count', 'index', '__reversed__', '__getitem__', '__iter__', '__contains__'}

SET 91

Set Sized, Iterabel, Container {'__iter__', '__len__', '__contains__'} 92(, , ) {'__iter__', '__len__', '__contains__'}

Set Set 93(, , ) {'__hash__', '__rand__', '_from_iterable', '__lt__', 'isdisjoint', '__or__', '__and__', '__ge__', '_hash', '__rxor__', '__ror__', '__eq__', '__le__', '__xor__', '__rsub__', '__gt__', '__sub__'}

MAPPING 94

MAPPING 95ABCInherits fromAbstract MethodsMixin MethodsMappingSized,Iterable,Container__getitem__,__iter__,__len__ __contains__, keys, items, values, get, __eq__, __ne__MutableMappingMapping__getitem__,__setitem__,__delitem__,__iter__,__len__ InheritedMapping methods pop, popitem, clear, update, andsetdefault

Mapping Sized, Iterabel, Container {'__iter__', '__len__', '__contains__'} 96(, , ){'__iter__', '__len__', '__contains__'}

Mapping 97(, , ) {'keys', '__hash__', 'items', 'get', '__eq__', '__getitem__', 'values', '__contains__'}

VIEW 98

VIEW 99ABCInherits fromMixin MethodsMappingViewSized __len__ItemsViewMappingView,Set __contains__, __iter__KeysViewMappingView,Set __contains__, __iter__ValuesViewMappingView __contains__, __iter__

view dict keys, values, items 100

view : View Set MappingView 101(, , ) (,) (, ) (,) (, ) True True

io ABC Moon Yong Joon102

io 103

io ABC io 104ABCInheritsStub MethodsMixin Methods and PropertiesIOBasefileno,seek, andtruncateclose,closed,__enter__,__exit__,flush,isatty,__iter__,__next__,readable,readline,readlines,seekable,tell,writable, andwritelinesRawIOBaseIOBaseReadintoandwriteInheritedIOBasemethods,read,andreadallBufferedIOBaseIOBasedetach,read,read1,andwriteInheritedIOBasemethods,readintoTextIOBaseIOBasedetach,read,readline, andwriteInheritedIOBasemethods,encoding,errors, andnewlines

io ABC io 105

io 106

File : text I/O File io.StringIO 107

File : Binary I/O File io.StringIO binary 108

File : raw I/O File binary buffering 0 109

io.BytesIO 110

io.BytesIO : binary BytesIO class binary 111

io.StringIO 112

io.StringIO : text StringIO class text 113

io.FileIO 114

File mode115ModesDescriptionr . .rb r+ rb+ w . wb . w+ , wb+ . . .a . . , . .ab . . , . .a+ . . . .ab+ . . . .

io.FileIO: binary FileIO class rb mode default 116

file Moon Yong Joon117

File 118

File: text File open TextIOWrapper 119

4.

Moon Yong Joon120

Everything is an object121

122 (object)(object) id (Identity) (object) class type (object) value

, , , 123 ,

NoneType124

NoneType NoneType type class None False 125

NotImplementedType126

NotImplementedType NotImplementedType type class NotImplemented True 127

Ellipsis128

Ellipsis ellipsis type class Ellipsis() True 129

Ellipsis : numpy ellipsis numpy index 130

Callable type 131

Callable types Callable types __call__ 132User-defined functionsInstance methodsGenerator functionsCoroutine functionsBuilt-in functionsBuilt-in methodsClassesClass Instances

Class Instances : __call__ class instance Callable types __call__ 133

/ : __get__ function __get__ 134

Internal types 135

Internal types Internal types 136Internal typesCode objectsFrame objectsTraceback objectsSlice objectsStatic method objectsClass method objects

classmethod/staticmethod 137

{'s': , 'c': , '__module__': '__main__', '__doc__': None, '__dict__': , '__weakref__': }

Number 138

Number Number 139Number int floatcomplex

10 10 numbers 140

2,8,16 2,8,16 int class , numbers 141

numbers

Sequence 142

sequence sequence 143SequenceImmutableSequenceMutableSequence str tuplebytes listbytearray

sequence 1 collections.abc sequence 144

sequence 2 collections.abc sequence 145

Mapping/Set 146

Mapping/set Mapping/set 147MappingSet types dict set frozenset

mapping collections.abc mapping 148

set/frozenset collections.abc set/frozenset 149

5. iteratorgenerator

Moon Yong Joon150

iterator type 151

iterator types iterator types __iter__, __next__ 152Iterator usered defined classGenerator expressionGenerator functions

abc.Iterator class 153(,) (,) ['__abstractmethods__', '__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__next__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__slots__', '__str__', '__subclasshook__', '_abc_cache', '_abc_negative_cache', '_abc_negative_cache_version', '_abc_registry']

iterator class : Iterator class 154

iterator class : Iterator class 155

generator expression generator iterator 156

generator functions generator iterator 157

Generator type 158

generator types generator types iterator __iter__, __next__ close, send, throw 159Generator expressionGenerator functions

abc.Generator class Iterator Generator close, send, throw 160

(,) ['__abstractmethods__', '__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__next__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__slots__', '__str__', '__subclasshook__', '_abc_cache', '_abc_negative_cache', '_abc_negative_cache_version', '_abc_registry']

(,) ['__abstractmethods__', '__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__next__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__slots__', '__str__', '__subclasshook__', '_abc_cache', '_abc_negative_cache', '_abc_negative_cache_version', '_abc_registry', 'close', 'send', 'throw']

generator expression generator generator 161

generator functions generator generator 162

Coroutine 163

collections.abc 164ABCInherits fromAbstract MethodsMixin MethodsAwaitable__await__CoroutineAwaitablesend,throw close

generator vs.coroutineGenerator coroutine send 165

Coroutine : send yield send

Yield send 166

Generator : Generator send 167