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PYTHON TYPE HINTS Igor Leroy

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Page 1: Python Type Hints

PYTHON TYPE HINTS

Igor Leroy

Page 2: Python Type Hints

PYTHON

• python 2 e 3

• Fortemente tipada

• Dinamicamente tipada

Page 3: Python Type Hints

TIPAGEM FORTE

Page 4: Python Type Hints

TIPAGEM DINÂMICA

Page 5: Python Type Hints

TIPAGEM DINÂMICA

- o que pode ser num?- o que ela retorna?- e a documentação?

Page 6: Python Type Hints

TIPAGENS ESTÁTICAS

Page 7: Python Type Hints

TIPAGENS DINÂMICAS

terra typescript ruby 3 python 3.5

hack

Page 8: Python Type Hints

PEP 484https://github.com/ambv/typehinting

https://github.com/ambv/typehinting
Page 9: Python Type Hints

WHY?• Editors/IDEs

• Linter capabilities

• Documentation

• Refactoring

Page 10: Python Type Hints
Page 11: Python Type Hints

TYPESint # integer objects of arbitrary sizefloat # floating point numberbool # boolean valuestr # unicode stringbytes # 8-bit stringobject # the common base classList[str] # list of str objectsDict[str, int] # dictionary from str to intIterable[int] # iterable object containing intsSequence[bool] # sequence of booleans

Page 12: Python Type Hints

ACABOU A MAGIA?

Page 13: Python Type Hints

Any # dynamically typed valueUnion[str, bytes] # set of expected types for a single argumentCallable # lambda and functions objectsAnyStr # equivalent to TypeVar('AnyStr', str, bytes)

e mais…

Page 14: Python Type Hints
Page 15: Python Type Hints

IGNORING TYPE CHECKER

@no_type_check decorator on classes and functions

a # type: ignore comment on arbitrary lines

Page 16: Python Type Hints

PYTHON 3.5?VAI QUEBRAR TUDO!

MENTIRA

Page 17: Python Type Hints

PYHTON 3.5previsão:13 de setembro de 2015

Page 18: Python Type Hints

REFERÊNCIAS

• http://mypy-lang.org/

• http://sdtimes.com/python-3-5-include-type-hinting/

• https://www.youtube.com/watch?v=2wDvzy6Hgxg

https://www.youtube.com/watch?v=2wDvzy6Hgxg
Page 19: Python Type Hints

OBRIGADO!

lerrua lerrua


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