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Nc sL|dks t|dk r<|dk s ttdd|Ds:t|nt|}d} xJ|D]B} | tkrbtdt| trN| jttfkrN| dk rtd| j } qNW| dkr|} njt |} t | | kstdd fdd|Dt dd|Drd nd d d d| Df| }|} |dk r>t |tjkr>||kr>|f|}td d|D}t d d|Drvtdd|D}|||dtt|j||||dd} tt| d|s| nt||| _ |rtdd|Dnd| _t| | _|dkr| | _n|dk r|j| _|j| _t| drH|r8t| n tt| | _ | S)Ncss|]}t|tVqdS)N)r}r)rtrrrrpsz(_ProtocolMeta.__new__..z!Cannot inherit from plain GenericzACannot inherit from Generic[...] or Protocol[...] multiple times.z1Some type variables (%s) are not listed in %s[%s]z, c3s|]}|krt|VqdS)N)str)rr)gvarsetrrrscss|]}|jtkVqdS)N)rr)rbrrrrsrrLcss|]}t|VqdS)N)r)rgrrrrscss$|]}t|trt|n|VqdS)N)r}rr)rrrrrrscss |]}t|to|tk VqdS)N)r}rr)rrrrrrscss|]}|tk r|VqdS)N)r)rrrrrrs)rrT)rWrcss*|]"}|tkrdn|tkrdn|VqdS).rN)rr)rarrrrsr )!rrr rrr}rrrLrrrrrorABCMetarupdaterYr( __setattr__rrr rr _abc_registry _abc_cacherr{r r|r)r"rZr[r\tvarsr)originr orig_basesgvarsrtvarsetZ initial_basesrR)r])rrr(isj                z_ProtocolMeta.__new__cstj||jdds2tddjD_jrxfjddD]T}|tt fksH|j dkrl|j t ksHt |tr||jsHt |tr|jt ksHtd|qHWdd}|_fd d }d jkr|_dS) Nrcss*|]"}|tkp t|to |jtkVqdS)N)rLr}rr)rrrrrrsz)_ProtocolMeta.__init__..rnzcollections.abcz7Protocols can only inherit from other protocols, got %rc_st|jrtddS)Nz Protocols cannot be instantiated)rorr)rRr)r*rrr_no_inits z(_ProtocolMeta.__init__.._no_initcsjddstSt|ts$tdxttD]h}xb|jD]T}||jkr\|j|dkrZtSPt|di}t|t j r:||kr:t|t r:|j r:Pq:WtSq.WdS)Nrz"issubclass() arg 1 must be a classrT) r/getr0r}rorrr.rrpMappingrr)r~rrr)r"rr _proto_hooks$      z+_ProtocolMeta.__init__.._proto_hookr)rYrmr/rrrrr.rrrr_PROTO_WHITELISTr}r rrrr)r"r)r*rrr)r])r"rrms&        z_ProtocolMeta.__init__csZtddrtr$tjr$dSjrJtfddtDrJdStt S)NrFTc3s8|]0}t|o.tt|d p.t|dk VqdS)N)rrr)rr)instancerRrrrsz2_ProtocolMeta.__instancecheck__..) rrrr]rrrrYrrT)rRr)r])rrRrrTs  z_ProtocolMeta.__instancecheck__cs|jdk r*tdjddkr&tddS|jddrf|jddsftdjddkr^dStd |jddrt|stdjddkrtt | |Std tt | |S) Nrnr)rrzCParameterized generics cannot be used with class or instance checksFrr)rrrpzBInstance and class checks can only be used with @runtime protocolsz.css|]}t|tVqdS)N)r}r)rrrrrr sz0Parameters to %r[...] must all be type variablesz(Parameters to %r[...] must all be uniquez'Cannot subscript already-subscripted %sr)rr)rrr)r}rrrrrrrLrr!rrr rr r&r]rrrr/rr)rRparamsrr)prependr)rrrssD       z_ProtocolMeta.__getitem__)NNNNN) rrrrV OLD_GENERICSr(rmrTrUrrsr^rr)r]rrbs@ /  rc@s eZdZdZdZdZddZdS)rLaBase class for protocol classes. Protocol classes are defined as:: class Proto(Protocol): def meth(self) -> int: ... Such classes are primarily used with static type checkers that recognize structural subtyping (static duck-typing), for example:: class C: def meth(self) -> int: return 0 def func(x: Proto) -> int: return x.meth() func(C()) # Passes static type check See PEP 544 for details. Protocol classes decorated with @typing_extensions.runtime act as simple-minded runtime protocol that checks only the presence of given attributes, ignoring their type signatures. Protocol classes can be generic, they are defined as:: class GenProto({bases}): def meth(self) -> T: ... rTcOsBt|tkrtdtr.tt||f||St|j|f||S)NzIType Protocol cannot be instantiated; it can be used only as a base class)rrLrr r'r r)r"r)rlrrrr(Js  zProtocol.__new__N)rrrrVrrr(rrrrrL*s)r_zProtocol, Generic[T]z Protocol[T])r[)r r_collect_type_varscseZdZfddZZS)rcsVtddrtr$tjr$dSjrJtfddtDrJdStS)NrFTc3s8|]0}t|o.tt|d p.t|dk VqdS)N)rrr)rr)r"rrrrdsz2_ProtocolMeta.__instancecheck__..) rrrr]rrrrYrT)r"r)r])r"rrrT\s  z_ProtocolMeta.__instancecheck__)rrrrTr^rr)r]rrYscs<eZdZdZdZdZfddZeddZdd Z Z S) rLaBase class for protocol classes. Protocol classes are defined as:: class Proto(Protocol): def meth(self) -> int: ... Such classes are primarily used with static type checkers that recognize structural subtyping (static duck-typing), for example:: class C: def meth(self) -> int: return 0 def func(x: Proto) -> int: return x.meth() func(C()) # Passes static type check See PEP 544 for details. Protocol classes decorated with @typing_extensions.runtime act as simple-minded runtime protocol that checks only the presence of given attributes, ignoring their type signatures. Protocol classes can be generic, they are defined as:: class GenProto(Protocol[T]): def meth(self) -> T: ... rTcs|tkrtdt|S)NzIType Protocol cannot be instantiated; it can only be used as a base class)rLrrYr()r"r)rl)r]rrr(szProtocol.__new__cst|ts|f}|s,|tk r,td|jdtfdd|D}|tkrtdd|Dsd}xt||tr~|d7}qfWtd|d||t t |t |krtd n t ||t ||S) Nz)Parameter list to {}[...] cannot be emptyz*Parameters to generic types must be types.c3s|]}t|VqdS)N)r )rr)rrrrsz-Protocol.__class_getitem__..css|]}t|tVqdS)N)r}r)rrrrrrsrrnzJParameters to Protocol[...] must all be type variables. 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At runtime it is equivalent to a plain dict. TypedDict creates a dictionary type that expects all of its instances to have a certain set of keys, with each key associated with a value of a consistent type. This expectation is not checked at runtime but is only enforced by type checkers. Usage:: class Point2D(TypedDict): x: int y: int label: str a: Point2D = {'x': 1, 'y': 2, 'label': 'good'} # OK b: Point2D = {'z': 3, 'label': 'bad'} # Fails type check assert Point2D(x=1, y=2, label='first') == dict(x=1, y=2, label='first') The type info can be accessed via the Point2D.__annotations__ dict, and the Point2D.__required_keys__ and Point2D.__optional_keys__ frozensets. TypedDict supports two additional equivalent forms:: Point2D = TypedDict('Point2D', x=int, y=int, label=str) Point2D = TypedDict('Point2D', {'x': int, 'y': int, 'label': str}) The class syntax is only supported in Python 3.6+, while two other syntax forms work for Python 2.7 and 3.2+ csHeZdZdZfddZddZddZdd Zd d Zd d Z Z S)_AnnotatedAliasaKRuntime representation of an annotated type. At its core 'Annotated[t, dec1, dec2, ...]' is an alias for the type 't' with extra annotations. The alias behaves like a normal typing alias, instantiating is the same as instantiating the underlying type, binding it to types is also the same. cs2t|tr|j|}|j}t||||_dS)N)r}r+ __metadata__rrYrm)rRrmetadata)r]rrrms   z_AnnotatedAlias.__init__cCs$t|dkst|d}t||jS)Nrnr)r!rr+r,)rRrrrrr copy_withsz_AnnotatedAlias.copy_withcCs&dt|jddd|jDS)Nz#typing_extensions.Annotated[{}, {}]z, css|]}t|VqdS)N)r )rrrrrrsz+_AnnotatedAlias.__repr__..)rqrpryrrr,)rRrrrrxs z_AnnotatedAlias.__repr__cCstjt|jf|jffS)N)operatorgetitemrJrr,)rRrrr __reduce__sz_AnnotatedAlias.__reduce__cCs*t|tstS|j|jkrdS|j|jkS)NF)r}r+r0rr,)rRr~rrrrs   z_AnnotatedAlias.__eq__cCst|j|jfS)N)r{rr,)rRrrrr|sz_AnnotatedAlias.__hash__) rrrrVrmr.rxr1rr|r^rr)r]rr+s r+c@s0eZdZdZdZddZeddZddZd S) rJaAdd context specific metadata to a type. Example: Annotated[int, runtime_check.Unsigned] indicates to the hypothetical runtime_check module that this type is an unsigned int. 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Details: - It's an error to call `Annotated` with less than two arguments. - Nested Annotated are flattened:: Annotated[Annotated[T, Ann1, Ann2], Ann3] == Annotated[T, Ann1, Ann2, Ann3] - Instantiating an annotated type is equivalent to instantiating the underlying type:: Annotated[C, Ann1](5) == C(5) - Annotated can be used as a generic type alias:: Optimized = Annotated[T, runtime.Optimize()] Optimized[int] == Annotated[int, runtime.Optimize()] OptimizedList = Annotated[List[T], runtime.Optimize()] OptimizedList[int] == Annotated[List[int], runtime.Optimize()] rcOs tddS)Nz&Type Annotated cannot be instantiated.)r)r"r)r*rrrr(szAnnotated.__new__cCsLt|trt|dkrtdd}t|d|}t|dd}t||S)Nr,zUAnnotated[...] should be used with at least two arguments (a type and an annotation).z$Annotated[t, ...]: t must be a type.rrn)r}rr!rrpr r+)r"rrrr-rrrr s zAnnotated.__class_getitem__cOstd|jdS)NzCannot subclass {}.Annotated)rrqr)r"r)r*rrrr&szAnnotated.__init_subclass__N) rrrrVrr(rr rrrrrrJs  cCs\t|trt|jSt|tjrXtdd|jD}||jkrB|S||}|j |_ |S|S)z2Strips the annotations from a given type. css|]}t|VqdS)N)_strip_annotations)rrrrrr1sz%_strip_annotations..) r}r+r2rrprrrr._special)rZ stripped_argsrrrrr2+s     r2cCs*tj|||d}|r|Sdd|DS)a]Return type hints for an object. This is often the same as obj.__annotations__, but it handles forward references encoded as string literals, adds Optional[t] if a default value equal to None is set and recursively replaces all 'Annotated[T, ...]' with 'T' (unless 'include_extras=True'). The argument may be a module, class, method, or function. The annotations are returned as a dictionary. For classes, annotations include also inherited members. TypeError is raised if the argument is not of a type that can contain annotations, and an empty dictionary is returned if no annotations are present. BEWARE -- the behavior of globalns and localns is counterintuitive (unless you are familiar with how eval() and exec() work). The search order is locals first, then globals. - If no dict arguments are passed, an attempt is made to use the globals from obj (or the respective module's globals for classes), and these are also used as the locals. If the object does not appear to have globals, an empty dictionary is used. - If one dict argument is passed, it is used for both globals and locals. - If two dict arguments are passed, they specify globals and locals, respectively. )rurvcSsi|]\}}t||qSr)r2)rkrrrrr&[sz"get_type_hints..)rprIr))rSrurvZinclude_extrashintrrrrI9scCs t|dko|do|dS)z3Returns True if name is a __dunder_variable_name__.__)r!rendswith)rZrrr _is_dunder_sr9cseZdZdZfddZeddZddZdfd d Zd d Z e fd dZ ddZ ddZ fddZddZddZZS) AnnotatedMetazMetaclass for Annotatedc s8tdd|Dr"tdtttj||||f|S)Ncss|]}|tk VqdS)N)r)rrrrrrksz(AnnotatedMeta.__new__..zCannot subclass )rrrrJrYr()r"rZr[r\r*)r]rrr(jszAnnotatedMeta.__new__cCs |dS)Nr,)r )rRrrrr,oszAnnotatedMeta.__metadata__cCsP|\}}}t|ts t|}n|d|}ddd|D}d|||fS)Nrz, css|]}t|VqdS)N)r )rargrrrrysz+AnnotatedMeta._tree_repr..z %s[%s, %s])r}rrpry _tree_reprr)rRtreer"rr-Ztp_reprZmetadata_reprsrrrr<ss    zAnnotatedMeta._tree_reprNcsh|tkr tStj||d}t|dtrd|ddtkrd|dd}|dd}t|||dfS|S)N)rr)rnrr,)rJrYr r}r)rRrr)rZsub_tpZ sub_annot)r]rrr |s  zAnnotatedMeta._subs_treecCsX|jdkrtd|}x"t|tr<|dtkr<|d}qWt|trP|dS|SdS)z6Return the class used to create instance of this type.NzCCannot get the underlying type of a non-specialized Annotated type.rrn)rrr r}rrJ)rRr=rrr _get_conss   zAnnotatedMeta._get_conscst|ts|f}|jdk r&t|St|tr__orig_class__r)rRr)r*Zconsresultrrr__call__s  zAnnotatedMeta.__call__cCs,|jdk r t|s t||St|dS)N)rr9rr>r)rRrrrr __getattr__szAnnotatedMeta.__getattr__csJt|s|dr"t||n$|jdkr6t|nt|||dS)Nr)r9rrYrrrsetattrr>)rRrvalue)r]rrrs   zAnnotatedMeta.__setattr__cCs tddS)Nz+Annotated cannot be used with isinstance().)r)rRrSrrrrTszAnnotatedMeta.__instancecheck__cCs tddS)Nz+Annotated cannot be used with issubclass().)r)rRr"rrrrUszAnnotatedMeta.__subclasscheck__)NN)rrrrVr(propertyr,r<r r>rrsrArBrrTrUr^rr)r]rr:gs       r:c@seZdZdZdS)rJavAdd context specific metadata to a type. Example: Annotated[int, runtime_check.Unsigned] indicates to the hypothetical runtime_check module that this type is an unsigned int. Every other consumer of this type can ignore this metadata and treat this type as int. The first argument to Annotated must be a valid type, the remaining arguments are kept as a tuple in the __metadata__ field. Details: - It's an error to call `Annotated` with less than two arguments. - Nested Annotated are flattened:: Annotated[Annotated[T, Ann1, Ann2], Ann3] == Annotated[T, Ann1, Ann2, Ann3] - Instantiating an annotated type is equivalent to instantiating the underlying type:: Annotated[C, Ann1](5) == C(5) - Annotated can be used as a generic type alias:: Optimized = Annotated[T, runtime.Optimize()] Optimized[int] == Annotated[int, runtime.Optimize()] OptimizedList = Annotated[List[T], runtime.Optimize()] OptimizedList[int] == Annotated[List[int], runtime.Optimize()] N)rrrrVrrrrrJs)rcCs.t|trtSt|tr|jS|tkr*tSdS)aGet the unsubscripted version of a type. This supports generic types, Callable, Tuple, Union, Literal, Final, ClassVar and Annotated. Return None for unsupported types. Examples:: get_origin(Literal[42]) is Literal get_origin(int) is None get_origin(ClassVar[int]) is ClassVar get_origin(Generic) is Generic get_origin(Generic[T]) is Generic get_origin(Union[T, int]) is Union get_origin(List[Tuple[T, T]][int]) == list N)r}r+rJrrr)rkrrrrHs  cCsdt|tr|jf|jSt|tr`|j}t|tjj kr\|dt k r\t |dd|df}|SdS)aGet type arguments with all substitutions performed. For unions, basic simplifications used by Union constructor are performed. Examples:: get_args(Dict[str, int]) == (str, int) get_args(int) == () get_args(Union[int, Union[T, int], str][int]) == (int, str) get_args(Union[int, Tuple[T, int]][str]) == (int, Tuple[str, int]) get_args(Callable[[], T][int]) == ([], int) rNrr) r}r+rr,rrrHrrrEllipsisr)rkrrrrrGs   TypeAliasc@seZdZddZdS)_TypeAliasFormcCs d|jS)Nztyping_extensions.)r)rRrrrrx sz_TypeAliasForm.__repr__N)rrrrxrrrrrHsrHcCstd|dS)a&Special marker indicating that an assignment should be recognized as a proper type alias definition by type checkers. For example:: Predicate: TypeAlias = Callable[..., bool] It's invalid when used anywhere except as in the example above. z{} is not subscriptableN)rrq)rRr#rrrrG#s c@seZdZddZdS)rHcCs d|jS)Nztyping_extensions.)r)rRrrrrx3sz_TypeAliasForm.__repr__N)rrrrxrrrrrH2saSpecial marker indicating that an assignment should be recognized as a proper type alias definition by type checkers. 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For example:: Predicate: TypeAlias = Callable[..., bool] It's invalid when used anywhere except as in the example above. rcCs tddS)Nz+TypeAlias cannot be used with isinstance().)r)rRrSrrrrTVsz _TypeAliasBase.__instancecheck__cCs tddS)Nz+TypeAlias cannot be used with issubclass().)r)rRr"rrrrUYsz _TypeAliasBase.__subclasscheck__cCsdS)Nztyping_extensions.TypeAliasr)rRrrrrx\sz_TypeAliasBase.__repr__N)rrrrVrrTrUrxrrrrrJIs  rJc@s(eZdZdZddZddZddZdS) rIzMetaclass for TypeAliascCs tddS)Nz+TypeAlias cannot be used with isinstance().)r)rRrSrrrrTdsz _TypeAliasMeta.__instancecheck__cCs tddS)Nz+TypeAlias cannot be used with issubclass().)r)rRr"rrrrUgsz _TypeAliasMeta.__subclasscheck__cOs tddS)NzCannot instantiate TypeAlias)r)rRr)r*rrrrAjsz_TypeAliasMeta.__call__N)rrrrVrTrUrArrrrrIasc@seZdZdZdZdS)rGa&Special marker indicating that an assignment should be recognized as a proper type alias definition by type checkers. For example:: Predicate: TypeAlias = Callable[..., bool] It's invalid when used anywhere except as in the example above. rN)rrrrVrrrrrrGms )NNF)rr contextlibrrpcollections.abcrr/rrrrrZPEP_560rorr r r r r ImportErrorr Z SUBS_TREErrrrr&rr'r+Z _geqv_defined_collections_abc_check_methodsr6rZHAVE_ANNOTATEDextendrZHAVE_PROTOCOLSrOrPrQrXr8r`rarbrcrerfrgr7rir _SpecialFormrrrr@rArBrrrrrDr9rrrrrrrr<rMutableSequencer:rrrexecr=rMutableMappingr;rrrDictrrrrCrErrFrrrrrLrrVrqrr rrNrMr?r>rr__text_signature__r$r rrrrJrIr+r2r9r:rHrGrGrHrIrJrrrrsP                   5 3    4 3    / -                       &                      I' &    ,) )6 $b"