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def repeat(x: T, n: int) -> List[T]:
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class Employee: pass
class Manager(Employee): pass
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Union[Manager, int, Employee] == Union[int, Employee]
Union[Employee, Manager] == Employee
- Similar for object::
Union[int, object] == object
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aC Abstract base class for generic types.
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class Mapping(Generic[KT, VT]):
def __getitem__(self, key: KT) -> VT:
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r� Y nX | S )aI Decorator to indicate that annotations are not type hints.
The argument must be a class or function; if it is a class, it
applies recursively to all methods and classes defined in that class
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rl ro r �copyr' r� r� �valuesr� r� r! r9 rP )r{ Z arg_attrsr r r� rC rC rD r9 s
c s t j� �� fdd��}|S )z�Decorator to give another decorator the @no_type_check effect.
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c s � | |�}t |�}|S )N)r9 )r\ r] r� )� decoratorrC rD �wrapped_decorator/ s
z2no_type_check_decorator.<locals>.wrapped_decorator)r� r� )r, r- rC )r, rD r: ( s c O s t d��dS )z*Helper for @overload to raise when called.z�You should not call an overloaded function. A series of @overload-decorated functions outside a stub module should always be followed by an implementation that is not @overload-ed.N)�NotImplementedError)r\ r] rC rC rD �_overload_dummy8 s r/ c C s t S )a
Decorator for overloaded functions/methods.
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@overload
def utf8(value: None) -> None: ...
@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
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follow it with an implementation. The implementation should *not*
be decorated with @overload. For example:
@overload
def utf8(value: None) -> None: ...
@overload
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@overload
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)r/ )r� rC rC rD r; A s c s0 e Zd ZdZ� fdd�Zdd� Zdd� Z� ZS )�
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tS | tkrdS | j� }x(|D ] � t� fdd�|jD ��s$dS q$W dS )NTc 3 s | ]}� |j kV qd S )N)r )r� �d)r rC rD r� w s z2_ProtocolMeta.__subclasscheck__.<locals>.<genexpr>F)rh r~ r� �_get_protocol_attrsr� r� )r[ rV �attrsrC )r rD r� j s
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krT|dkrT|dkrT|dkrT|dkrT|dkrT|dkrT|j|� qTW qBW |S )Nrh Fr� r �__abstractmethods__r" rj r� r r� rq r2 r� r� r� r� r� r� rd ) r� r� rA r� r� r �keysrL �add)r[ Zprotocol_basesr� r3 r� r rC rC rD r2 { s< z!_ProtocolMeta._get_protocol_attrs)rA rd r@ rg r� r� r2 ri rC rC )rZ rD r0 ^ s r0 c @ s e Zd ZdZf ZdZdS )r� z�Internal base class for protocol classes.
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TN)rA rd r@ rg rq rh rC rC rC rD r� � s r� � Awaitablec @ s e Zd Zf ZdS )r7 N)rA rd r@ rq rC rC rC rD r7 � s )r� � Coroutinec @ s e Zd Zf ZdS )r8 N)rA rd r@ rq rC rC rC rD r8 � s �
AsyncIterablec @ s e Zd Zf ZdS )r9 N)rA rd r@ rq rC rC rC rD r9 � s c @ s e Zd Zf ZdS )�
AsyncIteratorN)rA rd r@ rq rC rC rC rD r: � s r: c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s" e Zd Zf Zeed�dd��ZdS )r* )�returnc C s d S )NrC )r[ rC rC rD �__int__� s zSupportsInt.__int__N)rA rd r@ rq r �intr< rC rC rC rD r* � s c @ s" e Zd Zf Zeed�dd��ZdS )r) )r; c C s d S )NrC )r[ rC rC rD � __float__� s zSupportsFloat.__float__N)rA rd r@ rq r �floatr> rC rC rC rD r) � s c @ s" e Zd Zf Zeed�dd��ZdS )r( )r; c C s d S )NrC )r[ rC rC rD � __complex__� s zSupportsComplex.__complex__N)rA rd r@ rq r �complexr@ rC rC rC rD r( � s c @ s" e Zd Zf Zeed�dd��ZdS )r' )r; c C s d S )NrC )r[ rC rC rD � __bytes__� s zSupportsBytes.__bytes__N)rA rd r@ rq r �bytesrB rC rC rC rD r' � s c @ s" e Zd Zf Zeed�dd��ZdS )r& )r; c C s d S )NrC )r[ rC rC rD �__abs__� s zSupportsAbs.__abs__N)rA rd r@ rq r r� rD rC rC rC rD r& � s c @ s& e Zd Zf Zedeed�dd��ZdS )r+ r )�ndigitsr; c C s d S )NrC )r[ rE rC rC rD � __round__ s zSupportsRound.__round__N)r )rA rd r@ rq r r= r� rF rC rC rC rD r+ s c @ s e Zd Zf ZdS )r% N)rA rd r@ rq rC rC rC rD r%
s c @ s" e Zd Zf Zedd�dd��ZdS )r% zIterator[T_co])r; c C s d S )NrC )r[ rC rC rD � __reversed__ s zReversible.__reversed__N)rA rd r@ rq r rG rC rC rC rD r%
s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r s �
Collectionc @ s e Zd Zf ZdS )rH N)rA rd r@ rq rC rC rC rD rH s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r ' s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r + s c @ s e Zd Zf ZdS )r! N)rA rd r@ rq rC rC rC rD r! 0 s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r 6 s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r : s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r ? s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" E s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" I s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" M s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r R s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r V s c @ s e Zd Zf Zdd� ZdS )r0 c O s$ | j tkrtd��tt| f|�|�S )Nz4Type List cannot be instantiated; use list() instead)r� r0 rP r r )rV r\ r] rC rC rD rU ^ s
z List.__new__N)rA rd r@ rq rU rC rC rC rD r0 Z s c @ s e Zd Zf Zdd� ZdS )r- c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r- � collections�dequer )rV r\ r] rC rC rD rU i s
z
Deque.__new__N)rA rd r@ rq rU rC rC rC rD r- e s c @ s e Zd Zf Zdd� ZdS )r1 c O s$ | j tkrtd��tt| f|�|�S )Nz2Type Set cannot be instantiated; use set() instead)r� r1 rP r r� )rV r\ r] rC rC rD rU s s
z Set.__new__N)rA rd r@ rq rU rC rC rC rD r1 o s c @ s e Zd Zf Zdd� ZdS )r2 c O s$ | j tkrtd��tt| f|�|�S )Nz>Type FrozenSet cannot be instantiated; use frozenset() instead)r� r2 rP r r� )rV r\ r] rC rC rD rU } s
zFrozenSet.__new__N)rA rd r@ rq rU rC rC rC rD r2 z s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r$ N)rA rd r@ rq rC rC rC rD r$ � s �AbstractContextManagerc @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s2 e Zd Zf Zdd� Zejdd� �Zedd� �Z dS )r c C s | S )NrC )r[ rC rC rD � __enter__� s zContextManager.__enter__c C s d S )NrC )r[ �exc_type� exc_value� tracebackrC rC rD �__exit__� s zContextManager.__exit__c C s8 | t kr4tdd� |jD ��r4tdd� |jD ��r4dS tS )Nc s s | ]}d |j kV qdS )rL N)r )r� �BrC rC rD r� � s z2ContextManager.__subclasshook__.<locals>.<genexpr>c s s | ]}d |j kV qdS )rP N)r )r� rQ rC rC rD r� � s T)r r� r� r~ )rV �CrC rC rD r� � s
z ContextManager.__subclasshook__N)
rA rd r@ rq rL r� r rP � classmethodr� rC rC rC rD r � s �AbstractAsyncContextManagerc @ s e Zd Zf ZdS )�AsyncContextManagerN)rA rd r@ rq rC rC rC rD rU � s rU � a�
class AsyncContextManager(Generic[T_co]):
__slots__ = ()
async def __aenter__(self):
return self
@abc.abstractmethod
async def __aexit__(self, exc_type, exc_value, traceback):
return None
@classmethod
def __subclasshook__(cls, C):
if cls is AsyncContextManager:
if sys.version_info[:2] >= (3, 6):
return _collections_abc._check_methods(C, "__aenter__", "__aexit__")
if (any("__aenter__" in B.__dict__ for B in C.__mro__) and
any("__aexit__" in B.__dict__ for B in C.__mro__)):
return True
return NotImplemented
__all__.append('AsyncContextManager')
c @ s e Zd Zf Zdd� ZdS )r. c O s$ | j tkrtd��tt| f|�|�S )Nz4Type Dict cannot be instantiated; use dict() instead)r� r. rP r r� )rV r\ r] rC rC rD rU � s
z Dict.__new__N)rA rd r@ rq rU rC rC rC rD r. � s c @ s e Zd Zf Zdd� ZdS )r/ c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r/ rI � defaultdictr )rV r\ r] rC rC rD rU � s
zDefaultDict.__new__N)rA rd r@ rq rU rC rC rC rD r/ � s c @ s e Zd Zf Zdd� ZdS )r, c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r, rI r )rV r\ r] rC rC rD rU � s
zCounter.__new__N)rA rd r@ rq rU rC rC rC rD r, � s �ChainMapc @ s e Zd Zf Zdd� ZdS )rX c O s* | j tkrtj||�S ttj| f|�|�S )N)r� rX rI r )rV r\ r] rC rC rD rU � s
zChainMap.__new__N)rA rd r@ rq rU rC rC rC rD rX � s c @ s e Zd Zf Zdd� ZdS )r4 c O s$ | j tkrtd��tt| f|�|�S )Nz@Type Generator cannot be instantiated; create a subclass instead)r� r4 rP r �_G_base)rV r\ r] rC rC rD rU s
zGenerator.__new__N)rA rd r@ rq rU rC rC rC rD r4 s �AsyncGeneratorc @ s e Zd Zf ZdS )rZ N)rA rd r@ rq rC rC rC rD rZ s �CT_co)r� r� c @ s e Zd ZdZf ZdS )r a� A special construct usable to annotate class objects.
For example, suppose we have the following classes::
class User: ... # Abstract base for User classes
class BasicUser(User): ...
class ProUser(User): ...
class TeamUser(User): ...
And a function that takes a class argument that's a subclass of
User and returns an instance of the corresponding class::
U = TypeVar('U', bound=User)
def new_user(user_class: Type[U]) -> U:
user = user_class()
# (Here we could write the user object to a database)
return user
joe = new_user(BasicUser)
At this point the type checker knows that joe has type BasicUser.
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<listcomp>A s z!_make_nmtuple.<locals>.<listcomp>c S s g | ] \}}|�qS rC rC )r� r\ r� rC rC rD r] B s r rA �__main__) rI �
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zNamedTupleMeta.__new__)rA rd r@ rU ri rC rC )rZ rD rk W s rk c @ s e Zd ZdZdZddd�ZdS )r3 a4 Typed version of namedtuple.
Usage in Python versions >= 3.6::
class Employee(NamedTuple):
name: str
id: int
This is equivalent to::
Employee = collections.namedtuple('Employee', ['name', 'id'])
The resulting class has extra __annotations__ and _field_types
attributes, giving an ordered dict mapping field names to types.
__annotations__ should be preferred, while _field_types
is kept to maintain pre PEP 526 compatibility. (The field names
are in the _fields attribute, which is part of the namedtuple
API.) Alternative equivalent keyword syntax is also accepted::
Employee = NamedTuple('Employee', name=str, id=int)
In Python versions <= 3.5 use::
Employee = NamedTuple('Employee', [('name', str), ('id', int)])
TNc K s: |rt rtd��|d kr$|j� }n |r0td��t||�S )Nz>Keyword syntax for NamedTuple is only supported in Python 3.6+zIEither list of fields or keywords can be provided to NamedTuple, not both)rm rP r' rc )r[ rq Zfields�kwargsrC rC rD rU � s
zNamedTuple.__new__)N)rA rd r@ rg rO rU rC rC rC rD r3 y s c C s dd� }| |_ ||_|S )a% NewType creates simple unique types with almost zero
runtime overhead. NewType(name, tp) is considered a subtype of tp
by static type checkers. At runtime, NewType(name, tp) returns
a dummy function that simply returns its argument. Usage::
UserId = NewType('UserId', int)
def name_by_id(user_id: UserId) -> str:
...
UserId('user') # Fails type check
name_by_id(42) # Fails type check
name_by_id(UserId(42)) # OK
num = UserId(5) + 1 # type: int
c S s | S )NrC )rB rC rC rD �new_type� s zNewType.<locals>.new_type)rA Z
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d+�d,d-��Z e ee dd.�d/d0��Z e d1d�d2d3��Z e dd�d4d5��Z dS )>�IOa� Generic base class for TextIO and BinaryIO.
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NOTE: This does not distinguish between the different possible
classes (text vs. binary, read vs. write vs. read/write,
append-only, unbuffered). The TextIO and BinaryIO subclasses
below capture the distinctions between text vs. binary, which is
pervasive in the interface; however we currently do not offer a
way to track the other distinctions in the type system.
)r; c C s d S )NrC )r[ rC rC rD �mode� s zIO.modec C s d S )NrC )r[ rC rC rD rW � s zIO.nameNc C s d S )NrC )r[ rC rC rD �close� s zIO.closec C s d S )NrC )r[ rC rC rD �closed� s z IO.closedc C s d S )NrC )r[ rC rC rD �fileno� s z IO.filenoc C s d S )NrC )r[ rC rC rD �flush� s zIO.flushc C s d S )NrC )r[ rC rC rD �isatty� s z IO.isattyrK )r\ r; c C s d S )NrC )r[ r\ rC rC rD �read� s zIO.readc C s d S )NrC )r[ rC rC rD �readable� s z IO.readable)�limitr; c C s d S )NrC )r[ r rC rC rD �readline� s z IO.readline)�hintr; c C s d S )NrC )r[ r� rC rC rD � readlines� s z IO.readlinesr )�offset�whencer; c C s d S )NrC )r[ r� r� rC rC rD �seek� s zIO.seekc C s d S )NrC )r[ rC rC rD �seekable s z IO.seekablec C s d S )NrC )r[ rC rC rD �tell s zIO.tell)�sizer; c C s d S )NrC )r[ r� rC rC rD �truncate s z IO.truncatec C s d S )NrC )r[ rC rC rD �writable s z IO.writable)�sr; c C s d S )NrC )r[ r� rC rC rD �write s zIO.write)�linesr; c C s d S )NrC )r[ r� rC rC rD �
writelines s z
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IO[AnyStr]c C s d S )NrC )r[ rC rC rD rL s z IO.__enter__c C s d S )NrC )r[ ro r� rO rC rC rD rP s z IO.__exit__r� )r� r� )r� r� )r� )r )N) rA rd r@ rg rq r rm rw rW r rx r� ry r= rz r{ r| r5 r} r~ r� r0 r� r� r� r� r� r� r� r� rL rP rC rC rC rD rv � sT rv c @ sB e Zd ZdZf Zeeeef e d�dd��Z
ed d�dd��Z dS ) �BinaryIOz5Typed version of the return of open() in binary mode.)r� r; c C s d S )NrC )r[ r� rC rC rD r� ) s zBinaryIO.write)r; c C s d S )NrC )r[ rC rC rD rL - s zBinaryIO.__enter__N) rA rd r@ rg rq r r rC � bytearrayr= r� rL rC rC rC rD r� $ s r� c @ s� e Zd ZdZf Zeed�dd��Zeed�dd��Z ee
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TextIO.bufferc C s d S )NrC )r[ rC rC rD �encoding; s zTextIO.encodingc C s d S )NrC )r[ rC rC rD �errors? s z
TextIO.errorsc C s d S )NrC )r[ rC rC rD �line_bufferingC s zTextIO.line_bufferingc C s d S )NrC )r[ rC rC rD �newlinesG s zTextIO.newlinesc C s d S )NrC )r[ rC rC rD rL K s zTextIO.__enter__N)rA rd r@ rg rq r r� r� rm r� r r� r� r� r
r� r rL rC rC rC rD r� 2 s r� c @ s& e Zd ZdZdddgZeZeZeZdS )�ioz)Wrapper namespace for IO generic classes.rv r� r� N)rA rd r@ rg �__all__rv r� r� rC rC rC rD r� P s
r� z.io�Patternr� c C s | j S )N)�pattern)r� rC rC rD �<lambda>^ s r� �Matchc C s | j jS )N)�rer� )�mrC rC rD r� ` s c @ s e Zd ZdZddgZeZeZdS )r� z&Wrapper namespace for re type aliases.r� r� N)rA rd r@ rg r� r� r� rC rC rC rD r� c s r� z.re)r r )NN)NN)r rV )r r ) rU r^ rq rd re rf ra rg rh ri rj )rd rA r@ r" )�r� r r rI �
contextlibr� r� Z stdlib_rer> r� �collections.abcZcollections_abc� ImportErrorr? �_collections_abcr r r ro r� r^ �__str__rm rQ r� rE rM rN rH rI rG rF rc r� ra r} rS r� r
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