Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Python 文化中的接口和协议
Search
赖信涛
October 21, 2018
0
550
Python 文化中的接口和协议
2018 PyCon 中国演讲 PPT
赖信涛
October 21, 2018
Tweet
Share
Featured
See All Featured
Bash Introduction
62gerente
615
210k
Product Roadmaps are Hard
iamctodd
PRO
54
11k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Mobile First: as difficult as doing things right
swwweet
224
9.9k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
13k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
Designing for Performance
lara
610
69k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
YesSQL, Process and Tooling at Scale
rocio
173
14k
Raft: Consensus for Rubyists
vanstee
140
7.1k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
9
810
Transcript
3\WKRQ۸Ӿጱളݗܐᦓ Ӿࢵ Ӥၹ By laixintao
Ø Luatable Ø C Ø Java …… Ø
JavaScript! Ø Python __method__
• • “” • “xxx” • Dunder method
http://lucumr.pocoo.org/2011/7/9/python-and-pola/
None
——Leonardo Rochael
None
None
Python“” • Python “” •
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
__init__ __new__ __del__ https://www.python.org/download/releases/2.2/descrintro/#__new__
__new__
__new__
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
https://www.python.org/dev/peps/pep-0207/ https://docs.python.org/3/reference/expressions.html#value-comparisons obj1 __lt__x obj1
< x obj1.__lt__(x) x > obj1 1. obj1 > x 2. : obj1 < x 3. : obj1.__lt__(x)
@functools.total_ordering • • __eq__
https://github.com/zestyping/q/blob/master/q.py
• __pot__(self) +a • __add__(self,
other) a + b • __add__(self, other) b + a • __iadd__(self, other) • __int__(self) https://docs.python.org/3/library/operator.html
None
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
• __str__ str() • __repr__ repr()
__str__ • __bytes__ bytes() • __format__ format() • __dir__ dir() • __hash__ hash() https://dbader.org/blog/python-repr-vs-str
format
dir() https://github.com/laike9m/pdir2
hash () • • __eq__
• __eq__ hashable https://www.kawabangga.com/posts/1821 https://docs.python.org/3/reference/datamodel.html#object.__hash__
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
__getattr__ __setattr__ __delattr__ __getattribute__ featurehttps://www.kawabangga.com/posts/2809
https://docs.python.org/3/reference/datamodel.html#more-attribute-access-for-new-style-classes
__setattr__
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
• __len__() len() __bool__() return self.__len__()
• __getitem__() obj[key] • __setitem__() obj[key] = value • __missing__() obj[non_exist] • __delitem__() del obj[key] • __iter__() • __reversed__() reversed() __getattr__ __setattr__ __delattr__ __getattribute__ [] .
Python Python forhttp://effbot.org/zone/python-for-statement.htm __getitem__() for
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
• __instancecheck__(self, instance) isinstance(instance, class) • __subclasscheck__(self, subclass) issubclass(subclass,
class)
sized https://github.com/python/cpython/blob/9d4712bc8f26bf1d7e62 6b53ab092fe030bcd68d/Lib/_collections_abc.py#L359
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
First Class Object • •
• • https://dbader.org/blog/python-first-class-functions https://www.kawabangga.com/posts/2613
__call__()
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
• • __enter__()
• __exit__() https://www.kawabangga.com/posts/2010
print
contextlib.contextmanager
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
@property https://www.kawabangga.com/posts/2302
…… •descr.__get__(self, obj, type=None) -> value •descr.__set__(self, obj, value) ->
None •descr.__delete__(self, obj) -> None https://docs.python.org/3.7/howto/descriptor.html
ORM
function method • method __dict__
function • function __get__() method https://docs.python.org/3.7/howto/descriptor.html#functions-and-methods
• ! • '2/& • )%+* •
%," • 1+%) • • -$%. • (# • 0 • • .%
• __copy__(self) copy.copy() • __deepcopy__(self, memodict={}) copy.deepcopy()
pickle • object.__getnewargs_ex__() • object.__getnewargs__() • object.__getstate__() • object.__setstate__(state) •
object.__reduce__() • object.__reduce_ex__(protocol) https://www.kawabangga.com/posts/2782
@laixintao www.kawabangga.com SRE Python