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j� e j� <d S(� i ( t absolute_importt unicode_literalsN( t abstractmethodt abstractpropertyu Anyu Callableu ClassVaru Genericu Optionalu Tupleu Typeu TypeVaru Unionu AbstractSetu
ByteStringu Containeru Hashableu ItemsViewu Iterableu Iteratoru KeysViewu Mappingu MappingViewu MutableMappingu MutableSequenceu
MutableSetu Sequenceu Sizedu
ValuesViewu
Reversibleu SupportsAbsu
SupportsFloatu SupportsIntu Dictu DefaultDictu Listu Setu FrozenSetu
NamedTupleu Generatoru AnyStru castu get_type_hintsu NewTypeu
no_type_checku no_type_check_decoratoru overloadu Textu
TYPE_CHECKINGc C@ s% t j d d k r | j S| j Sd S( Ni i ( i i ( t syst version_infot __qualname__t __name__( t x( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _qualnameO s c C@ s, | j d � r( | d k r( | d } n | S( Nu _u
_TypeAliasu _ForwardRefu _TypingBaseu _FinalTypingBasei ( u
_TypeAliasu _ForwardRefu _TypingBaseu _FinalTypingBase( t
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d � Z RS( u� Metaclass for most types defined in typing module
(not a part of public API).
This also defines a dummy constructor (all the work for most typing
constructs is done in __new__) and a nicer repr().
c C@ s% t t | � j | t | � | | � S( N( t superR
t __new__t str( t clst namet basest namespace( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR g s c C@ sO xH | D]@ } t | | � r t d d j t t | � � p= d � � q q Wd S( Nu Cannot subclass %su , u ()( t
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c O@ s d S( N( ( t selft argst kwds( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __init__q s c C@ s | S( u' Override this in subclasses to interpret forward references.
For example, List['C'] is internally stored as
List[_ForwardRef('C')], which should evaluate to List[C],
where C is an object found in globalns or localns (searching
localns first, of course).
( ( R t globalnst localns( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt
_eval_typet s c C@ s d S( N( ( R t tvars( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _get_type_vars~ s c C@ s# t t | � � } d | j | f S( Nu %s.%s( R R t
__module__( R t qname( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __repr__� s ( R R% t __doc__t Falset _is_protocolR t classmethodR R R" R$ R' ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR
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t _TypingBasec B@ sP e Z d Z e Z d Z d � Z d � Z d � Z d � Z d � Z
d � Z RS( u0 Internal indicator of special typing constructs.c O@ s d S( N( ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s c O@ sa t | � d k rK t | d t � rK t | d t � rK t d | � � n t t | � j | � S( u� Constructor.
This only exists to give a better error message in case
someone tries to subclass a special typing object (not a good idea).
i i i u Cannot subclass %r( t lenR R t tupleR R R, R ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s
c C@ s | S( N( ( R R R! ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" � s c C@ s d S( N( ( R R# ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR$ � s c C@ s/ t | � } t t | � � } d | j | f S( Nu %s.%s( t typeR R R% ( R R R& ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR' � s c O@ s t d t | � � � d S( Nu Cannot instantiate %r( R R/ ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __call__� s ( ( R R% R( R
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__metaclass__t __slots__R R R" R$ R' R0 ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR, � s t _FinalTypingBasec B@ s& e Z d Z d Z d � Z d � Z RS( u� Internal mix-in class to prevent instantiation.
Prevents instantiation unless _root=True is given in class call.
It is used to create pseudo-singleton instances Any, Union, Optional, etc.
c O@ sR t t | � j | | | � } d | k r> | d t k r> | St d | � � d S( Nu _rootu Cannot instantiate %r( R R3 R t TrueR ( R R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s c C@ s t t | � j � S( N( R R/ R ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt
__reduce__� s ( ( R R% R( R2 R R5 ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR3 � s t _ForwardRefc B@ sA e Z d Z d
Z d � Z d � Z d � Z d � Z d � Z RS( u- Internal wrapper to hold a forward reference.u __forward_arg__u __forward_code__u __forward_evaluated__u __forward_value__c C@ s� t t | � j | � t | t � s; t d | f � � n y t | d d � } Wn$ t k
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d S( Nu, Forward reference must be a string -- got %ru <string>u evalu1 Forward reference must be an expression -- got %r( R R6 R R t
basestringR t compilet SyntaxErrort __forward_arg__t __forward_code__R) t __forward_evaluated__t Nonet __forward_value__( R t argt code( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s
c C@ s� | j s | | k r� | d k r; | d k r; i } } n* | d k rP | } n | d k re | } n t t | j | | � d � | _ t | _ n | j S( Nu* Forward references must evaluate to types.( R< R= t _type_checkt evalR; R> R4 ( R R R! ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" � s
c C@ s t d � � d S( Nu4 Forward references cannot be used with isinstance().( R ( R t obj( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __instancecheck__� s c C@ s t d � � d S( Nu4 Forward references cannot be used with issubclass().( R ( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __subclasscheck__� s c C@ s d | j f S( Nu _ForwardRef(%r)( R: ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR' � s ( u __forward_arg__u __forward_code__u __forward_evaluated__u __forward_value__( R R% R( R2 R R" RD RE R' ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR6 � s t
_TypeAliasc B@ sA e Z d Z d
Z d � Z d � Z d � Z d � Z d � Z RS( u: Internal helper class for defining generic variants of concrete types.
Note that this is not a type; let's call it a pseudo-type. It cannot
be used in instance and subclass checks in parameterized form, i.e.
``isinstance(42, Match[str])`` raises ``TypeError`` instead of returning
``False``.
u nameu type_varu impl_typeu type_checkerc C@ s( | | _ | | _ | | _ | | _ d S( ut Initializer.
Args:
name: The name, e.g. 'Pattern'.
type_var: The type parameter, e.g. AnyStr, or the
specific type, e.g. str.
impl_type: The implementation type.
type_checker: Function that takes an impl_type instance.
and returns a value that should be a type_var instance.
N( R t type_vart impl_typet type_checker( R R RG RH RI ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s c C@ s d | j t | j � f S( Nu %s[%s]( R R RG ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR'
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� S( Nu# %s cannot be further parameterized.u& %s is not a valid substitution for %s.u %s cannot be re-parameterized.( R RG t TypeVarR t __constraints__R/ t
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s c C@ s1 t | j t � s! t d � � n t | | j � S( Nu< Parameterized type aliases cannot be used with isinstance().( R RG RJ R RH ( R RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD s c C@ s1 t | j t � s! t d � � n t | | j � S( Nu< Parameterized type aliases cannot be used with issubclass().( R RG RJ R RL RH ( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRE s ( u nameu type_varu impl_typeu type_checker( R R% R( R2 R R' RO RD RE ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRF � s c C@ sC x< | D]4 } t | t � s+ t | t � r | j | � q q Wd S( N( R R
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_type_vars, s
c C@ s2 t | t � s t | t � r. | j | | � S| S( N( R R
R, R" ( RQ R R! ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" 2 s c C@ s� | d k r t d � St | t � r4 t | � } n t | t � rX t | � j d k s{ t | t t f � r� t | � r� t | d | f � � n t | � j d k r� t | d d � s� t | t
� r� t | � t t
f k r� t d | � � n | S( u� Check that the argument is a type, and return it (internal helper).
As a special case, accept None and return type(None) instead.
Also, _TypeAlias instances (e.g. Match, Pattern) are acceptable.
The msg argument is a human-readable error message, e.g.
"Union[arg, ...]: arg should be a type."
We append the repr() of the actual value (truncated to 100 chars).
u _ClassVaru Got %.100r.u _Unionu _Optionalu
__origin__u& Plain %s is not valid as type argumentN( u _Unionu _Optional( R= R/ R R7 R6 R, R t callableR t getattrR
t _gorgt Generict _Protocol( R? t msg( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRA 8 s
$#'c C@ s� t | t � rO t | t � rO | j d k r8 t | � Sd | j t | � f S| t k r_ d St | t j � rx | j St | � S( u; Return the repr() of an object, special-casing types (internal helper).
If obj is a type, we return a shorter version than the default
type.__repr__, based on the module and qualified name, which is
typically enough to uniquely identify a type. For everything
else, we fall back on repr(obj).
u __builtin__u %s.%su ...(
R R/ R
R% R t EllipsisRP t FunctionTypeR t repr( RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR S s
t ClassVarMetac B@ s e Z d Z d � Z RS( u Metaclass for _ClassVarc C@ s2 | j | � t t | � j | | | | � } | S( N( R R R\ R ( R R R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR i s
!( R R% R( R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR\ f s t _ClassVarc B@ sV e Z d Z e Z d Z d e d � Z d � Z d � Z
d � Z d � Z d � Z
RS(
uC Special type construct to mark class variables.
An annotation wrapped in ClassVar indicates that a given
attribute is intended to be used as a class variable and
should not be set on instances of that class. Usage::
class Starship:
stats = {} # type: ClassVar[Dict[str, int]] # class variable
damage = 10 # type: int # instance variable
ClassVar accepts only types and cannot be further subscribed.
Note that ClassVar is not a class itself, and should not
be used with isinstance() or issubclass().
u __type__c C@ s
| | _ d S( N( t __type__( R t tpt _root( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s c C@ sd t | � } | j d k rD | t | d j | j d � � d t �St d j | j d � � � d S( Nu {} accepts only types.i R` u {} cannot be further subscripted( R/ R^ R= RA t formatR R4 R ( R t itemR ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRO � s c C@ s% t | � t | j | | � d t �S( NR` ( R/ R" R^ R4 ( R R R! ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" � s c C@ sG t t | � j � } | j d k rC | d j t | j � � 7} n | S( Nu [{}]( R R] R' R^ R= Ra R ( R t r( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR' � s c C@ s t t | � j | j f � S( N( t hashR/ R R^ ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __hash__� s c C@ s< t | t � s t S| j d k r2 | j | j k S| | k S( N( R R] t NotImplementedR^ R= ( R t other( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __eq__� s
( u __type__N( R R% R( R\ R1 R2 R= R) R RO R" R' Re Rh ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR] o s R` t AnyMetac B@ s e Z d Z d � Z RS( u Metaclass for Any.c C@ s2 | j | � t t | � j | | | | � } | S( N( R R Ri R ( R R R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s
!( R R% R( R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRi � s t _Anyc B@ s, e Z d Z e Z d Z d � Z d � Z RS( u` Special type indicating an unconstrained type.
- Any is compatible with every type.
- Any assumed to have all methods.
- All values assumed to be instances of Any.
Note that all the above statements are true from the point of view of
static type checkers. At runtime, Any should not be used with instance
or class checks.
c C@ s t d � � d S( Nu% Any cannot be used with isinstance().( R ( R RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD � s c C@ s t d � � d S( Nu% Any cannot be used with issubclass().( R ( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRE � s ( ( R R% R( Ri R1 R2 RD RE ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRj � s
t TypeVarMetac B@ s e Z d � Z RS( c C@ s, | j | � t t | � j | | | | � S( N( R R Rk R ( R R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s
( R R% R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRk � s RJ c B@ sG e Z d Z e Z d Z d � Z d � Z d � Z d � Z d
� Z
RS( u� Type variable.
Usage::
T = TypeVar('T') # Can be anything
A = TypeVar('A', str, bytes) # Must be str or bytes
Type variables exist primarily for the benefit of static type
checkers. They serve as the parameters for generic types as well
as for generic function definitions. See class Generic for more
information on generic types. Generic functions work as follows:
def repeat(x: T, n: int) -> List[T]:
'''Return a list containing n references to x.'''
return [x]*n
def longest(x: A, y: A) -> A:
'''Return the longest of two strings.'''
return x if len(x) >= len(y) else y
The latter example's signature is essentially the overloading
of (str, str) -> str and (bytes, bytes) -> bytes. Also note
that if the arguments are instances of some subclass of str,
the return type is still plain str.
At runtime, isinstance(x, T) and issubclass(C, T) will raise TypeError.
Type variables defined with covariant=True or contravariant=True
can be used do declare covariant or contravariant generic types.
See PEP 484 for more details. By default generic types are invariant
in all type variables.
Type variables can be introspected. e.g.:
T.__name__ == 'T'
T.__constraints__ == ()
T.__covariant__ == False
T.__contravariant__ = False
A.__constraints__ == (str, bytes)
u __name__u __bound__u __constraints__u
__covariant__u __contravariant__c @ s) t t | � j | | | � | j d d � } | j d t � } | j d t � } | | _ | rv | rv t d � � n t | � | _ t | � | _
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� f d � | D� � | _ | r t | d
� | _ n d | _ d S( Nu boundu covariantu
contravariantu" Bivariant types are not supported.u- Constraints cannot be combined with bound=...i u" A single constraint is not allowedu: TypeVar(name, constraint, ...): constraints must be types.c 3@ s | ] } t | � � Vq d S( N( RA ( t .0RQ ( RX ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>
s u Bound must be a type.( R RJ R t getR= R) R t
ValueErrort boolt
__covariant__t __contravariant__R R- R. RK RA t __bound__( R R t constraintst kwargst boundt covariantt
contravariant( ( RX s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s$ c C@ s | | k r | j | � n d S( N( t append( R R# ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR$ s c C@ s5 | j r d } n | j r$ d } n d } | | j S( Nu +u -u ~( Rp Rq R ( R t prefix( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR' s c C@ s t d � � d S( Nu0 Type variables cannot be used with isinstance().( R ( R t instance( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD s c C@ s t d � � d S( Nu0 Type variables cannot be used with issubclass().( R ( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRE s ( u __name__u __bound__u __constraints__u
__covariant__u __contravariant__( R R% R( Rk R1 R2 R R$ R' RD RE ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRJ � s ( u Tu KTu VTu T_coRv u V_cou VT_cou T_contraRw c C@ s{ | d k r g } n t | d � r4 | j | | � St | t � rw x1 t | � D] \ } } | | k rP | | SqP Wn | S( u� An internal helper function: replace arg if it is a type variable
found in tvars with corresponding substitution from args or
with corresponding substitution sub-tree if arg is a generic type.
u
_subs_treeN( R= t hasattrt
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C@ s� | j d k r | S| j } g } x) | j d k rM | j | � | j } q% Wg } x* | j D] } | j t | | | � � q^ WxV | D]N } g } x9 t | j � D]( \ } } | j t | | j | � � q� W| } q� W| S( u� An internal helper function: calculate substitution tree
for generic cls after replacing its type parameters with
substitutions in tvars -> args (if any).
Repeat the same following __origin__'s.
Return a list of arguments with all possible substitutions
performed. Arguments that are generic classes themselves are represented
as tuples (so that no new classes are created by this function).
For example: _subs_tree(List[Tuple[int, T]][str]) == [(Tuple, int, str)]
N( t
__origin__R= Rx t __args__R� R} t __parameters__(
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� � qqWt � f d � | D� � S( u� An internal helper for Union creation and substitution: flatten Union's
among parameters, then remove duplicates and strict subclasses.
i i c 3@ sK | ]A } t | t � o$ | j d k s t | t � oB t � | � Vq d S( N( R t GenericMetaR� R= R/ RL ( Rl t t2( t t1( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s c 3@ s! | ] } | � k r | Vq d S( N( ( Rl RQ ( t
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c C@ s� | j s" t d t | � � � n t | � } t | j � } | | k r� t d | | k ra d n d t | � | | f � � n d S( Nu %s is not a generic classu0 Too %s parameters for %s; actual %s, expected %su manyu few( R� R R[ R- ( R R� t alent elen( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _check_generic� s c @ sD d � i � t j � j � t j � � � � � f d � � } | S( Ni� c @ sw | } y � | SWn^ t k
r, � | � St k
rr � | � } t � � � k rd � j � n | � | <| SXd S( N( R t KeyErrorR- t clear( R t keyt value( t cachet funct maxsize( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt inner� s
( t _cleanupsRx R� t functoolst wraps( R� R� ( ( R� R� R� s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _tp_cache� s
$t UnionMetac B@ s e Z d Z d � Z RS( u Metaclass for Union.c C@ s, | j | � t t | � j | | | | � S( N( R R R� R ( R R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s
( R R% R( R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s R� c B@ s� e Z d Z e Z d Z d d d � Z d � Z d � Z d � Z
d � Z e d
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d d d � Z d � Z d
� Z d � Z d � Z RS( u� Union type; Union[X, Y] means either X or Y.
To define a union, use e.g. Union[int, str]. Details:
- The arguments must be types and there must be at least one.
- None as an argument is a special case and is replaced by
type(None).
- Unions of unions are flattened, e.g.::
Union[Union[int, str], float] == Union[int, str, float]
- Unions of a single argument vanish, e.g.::
Union[int] == int # The constructor actually returns int
- Redundant arguments are skipped, e.g.::
Union[int, str, int] == Union[int, str]
- When comparing unions, the argument order is ignored, e.g.::
Union[int, str] == Union[str, int]
- When two arguments have a subclass relationship, the least
derived argument is kept, e.g.::
class Employee: pass
class Manager(Employee): pass
Union[int, Employee, Manager] == Union[int, Employee]
Union[Manager, int, Employee] == Union[int, Employee]
Union[Employee, Manager] == Employee
- Similar for object::
Union[int, object] == object
- You cannot subclass or instantiate a union.
- You can use Optional[X] as a shorthand for Union[X, None].
u __parameters__u __args__u
__origin__u
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__tree_hash__R R. R R� R� R- RR R| ( R R� t originR R R t subs_tree( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s* $ c @ s� | j d k r | St � � f d � | j D� � } t | j � � � } | | j k rl | | j k rl | S| j | | d t �S( Nc 3@ s! | ] } t | � � � Vq d S( N( R" ( Rl RQ ( R R! ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr> s R` ( R� R= R. R" R� RM R4 ( R R R! t ev_argst ev_origin( ( R R! s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" s " c C@ s) | j r% | j r% t | j | � n d S( N( R� R� R$ ( R R# ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR$ s c C@ sX | j d k r" t t | � j � S| j � } t | t � sG t | � S| d j | � S( Ni (
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c C@ s~ g } xQ | d D]E } t | t � s< | j t | � � q | j | d j | � � q Wt t | � j � d d j | � S( Ni i u [%s]u , ( R R. Rx R R� R R� R' R ( R R� t arg_listR? ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� s c @ s� | d k r t d � � n t | t � s6 | f } n | j d k rN d � n d � t � f d � | D� � } | t k r� t | | � n | j | d | d t �S( Nu Cannot take a Union of no types.u) Union[arg, ...]: each arg must be a type.u* Parameters to generic types must be types.c 3@ s | ] } t | � � Vq d S( N( RA ( Rl R� ( RX ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>/ s R� R` ( ( R R R. R� R= R� R� RM R4 ( R R� ( ( RX s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRO % s c C@ sS | t k r t St | | | � } t | � } t | � d k rH | d St f | S( Ni i ( R� R| R� R- ( R R# R R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR| 4 s c C@ s/ t | t � s | j � | k S| j | j k S( N( R R� R| R� ( R Rg ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRh = s c C@ s | j S( N( R� ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRe B s c C@ s t d � � d S( Nu( Unions cannot be used with isinstance().( R ( R RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD E s c C@ s t d � � d S( Nu( Unions cannot be used with issubclass().( R ( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRE H s ( u __parameters__u __args__u
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t OptionalMetac B@ s e Z d Z d � Z RS( u Metaclass for Optional.c C@ s, | j | � t t | � j | | | | � S( N( R R R� R ( R R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR R s
( R R% R( R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� O s t _Optionalc B@ s) e Z d Z e Z d Z e d � � Z RS( uE Optional type.
Optional[X] is equivalent to Union[X, None].
c C@ s# t | d � } t | t d � f S( Nu# Optional[t] requires a single type.( RA R� R/ R= ( R R? ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRO ` s ( ( R R% R( R� R1 R2 R� RO ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� W s c C@ s# x | j d k r | j } q W| S( u@ Return the farthest origin of a generic class (internal helper).N( R� R= ( t a( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRU i s
c C@ s t | � t | � k S( u6 Return whether two generic classes are equivalent (internal helper).
The intention is to consider generic class X and any of its
parameterized forms (X[T], X[int], etc.) as equivalent.
However, X is not equivalent to a subclass of X.
The relation is reflexive, symmetric and transitive.
( RU ( R� t b( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _geqvq s c C@ sc t } xV t | j d � D]A \ } } t | t � r t | � t k r | j | d } q q W| S( u� Helper for Generic.__new__.
Returns the class after the last occurrence of Generic or
Generic[...] in cls.__mro__.
i����i ( t objectR} t __mro__R R� RU RV ( R t next_in_mroR~ t c( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _next_in_mro� s
!c C@ s] | t k r t d | � � n | j d k rY t j d � j d d k rY t d � � n d S( u> An internal helper to prohibit isinstance([1], List[str]) etc.u5 Class %r cannot be used with class or instance checksi u __name__u abcu functoolsuC Parameterized generics cannot be used with class or instance checksN( u abcu functools( RV R R� R= R t _getframet f_globals( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _valid_for_check� s
c C@ s4 t | j t j � r! d � } n d � } t | � S( u� Construct a __subclasshook__ callable that incorporates
the associated __extra__ class in subclass checks performed
against cls.
c S@ s� t | � | j j | � } | t k r, | S| j t | d d � k rK t Sx? | j j � D]. } t | t � rv q[ n t | | � r[ t Sq[ Wt S( Nu __mro__( (
R� t __extra__t __subclasshook__Rf RT R4 t __subclasses__R R� RL ( R t subclasst rest scls( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt
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c S@ s- t | � | j r) t | | j � r) t St S( N( R� R� RL R4 Rf ( R R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s
( R R� t abct ABCMetaR+ ( R R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _make_subclasshook� s R� c B@ s� e Z d Z d
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S( Nu! Cannot inherit from plain Genericu0 Cannot inherit from Generic[...] multiple types.u6 Some type variables (%s) are not listed in Generic[%s]u , c 3@ s' | ] } | � k r t | � Vq d S( N( R ( Rl RQ ( t gvarset( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s c s@ s | ] } t | � Vq d S( N( R ( Rl t g( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s u __extra__c s@ s0 | ]& } t | t � r$ t | � n | Vq d S( N( R R� RU ( Rl R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s c s@ s* | ] } t | t � o! | t k Vq d S( N( R R� RV ( Rl R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s c s@ s! | ] } | t k r | Vq d S( N( RV ( Rl R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s c s@ s9 | ]/ } | t k r t n | t k r- d n | Vq d S( N( ( t _TypingEllipsisRY t _TypingEmpty( Rl R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s u __subclasshook__u __name__u
__extrahook__u __qualname__( R= RR RV R R R� R� R� R� R Rm R/ R� R� R. R� R R R� R� R� t __next_in_mro__t __orig_bases__R{ R� R R� R Rd R| R� ( R R R R R# R R� t extrat
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s c C@ s) | j r% | j r% t | j | � n d S( N( R� R� R$ ( R R# ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR$ s c @ s� | j r | j j � � � n d } | j rO t � � f d � | j D� � n d } | | j k rw | | j k rw | S| j | j | j t | j � d | r� t
| � n d d | d | d | j d | j �S( Nc 3@ s! | ] } t | � � � Vq d S( N( R" ( Rl R� ( R R! ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr> s R# R R� R� R� (
R� R" R= R� R. RM R t __bases__t dictt __dict__RR R� R� ( R R R! R� R� ( ( R R! s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" s $1 c C@ s5 | j d k r" t t | � j � S| j | j � � S( N( R� R= R R� R' R� R| ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR' & s c C@ s� g } xm | d D]a } | d k r3 | j d � q t | t � sX | j t | � � q | j | d j | � � q Wt t | � j � d d j | � S( Ni u ()i u [%s]u , ( ( Rx R R. R R� R R� R' R ( R R� R� R? ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� + s c C@ s< | j d k r | St | | | � } t | � f t | � S( N( R� R= R| RU R. ( R R# R R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR| 6 s c C@ sK t | t � s t S| j d k s1 | j d k r; | | k S| j | j k S( N( R R� Rf R� R= R� ( R Rg ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRh < s
c C@ s | j S( N( R� ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRe C s c @ s� t | t � s | f } n | rM t | � t k rM t d t | � � � n d � t � f d � | D� � } | t k r� t d � | D� � s� t d � � n t t | � � t | � k r� t d � � n | } | } n� | t t
f k rt | � } | } nh | t k r | } | } nM | j
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Nu) Parameter list to %s[...] cannot be emptyu* Parameters to generic types must be types.c 3@ s | ] } t | � � Vq d S( N( RA ( Rl R� ( RX ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>N s c s@ s | ] } t | t � Vq d S( N( R RJ ( Rl R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>Q s u5 Parameters to Generic[...] must all be type variablesu- Parameters to Generic[...] must all be uniqueu' Cannot subscript already-subscripted %sR# R R� R� R� ( R R. RU t TupleR R RV t allR- R� t CallableRR RW R� R[ R� RM R R� R� R� R� R� ( R R� R# R ( ( RX s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRO F sH
c C@ s# t | t � s t | j | � St S( N( R R/ RL RM R) ( R Rz ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD r s c C@ s@ | j | j | j t | j � | j | j | j | j | j � S( N(
RM R R� R� R� R� R� R� R� R� ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt __copy__| s N( R R% R( R= R R R$ R" R' R� R| Rh Re R� RO RD R� ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s P ,
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RV c B@ s# e Z d Z e Z d Z d � Z RS( uC Abstract base class for generic types.
A generic type is typically declared by inheriting from
this class parameterized with one or more type variables.
For example, a generic mapping type might be defined as::
class Mapping(Generic[KT, VT]):
def __getitem__(self, key: KT) -> VT:
...
# Etc.
This class can then be used as follows::
def lookup_name(mapping: Mapping[KT, VT], key: KT, default: VT) -> VT:
try:
return mapping[key]
except KeyError:
return default
c O@ s4 t | t � r t d � � n t | j | | | � S( NuH Type Generic cannot be instantiated; it can be used only as a base class( R� RV R R� R� ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R( R� R1 R2 R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRV � s R� c B@ s e Z d Z RS( u� Internal placeholder for () or []. Used by TupleMeta and CallableMeta
to allow empty list/tuple in specific places, without allowing them
to sneak in where prohibited.
( R R% R( ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s R� c B@ s e Z d Z RS( u( Internal placeholder for ... (ellipsis).( R R% R( ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s t TupleMetac B@ s/ e Z d Z e d � � Z d � Z d � Z RS( u Metaclass for Tuple (internal).c @ s | j d k s t | t � r5 t t | � j | � S| d k rZ t t | � j t f � St | t � su | f } n t
| � d k r� | d t k r� d � t | d � � } t t | � j | t
f � Sd � t � f d � | D� � } t t | � j | � S( Ni i u Tuple[t, ...]: t must be a type.i u* Tuple[t0, t1, ...]: each t must be a type.c 3@ s | ] } t | � � Vq d S( N( RA ( Rl R� ( RX ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>� s ( ( R� R= R� R� R R� RO R� R R. R- RY RA R� ( R R� R� ( ( RX s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRO � s " c C@ s, | j d k r t | t � St d � � d S( Nu5 Parameterized Tuple cannot be used with isinstance().( R� R= R R. R ( R RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD � s
c C@ s, | j d k r t | t � St d � � d S( Nu5 Parameterized Tuple cannot be used with issubclass().( R� R= RL R. R ( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRE � s
( R R% R( R� RO RD RE ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s R� c B@ s) e Z d Z e Z e Z d Z d � Z RS( u@ Tuple type; Tuple[X, Y] is the cross-product type of X and Y.
Example: Tuple[T1, T2] is a tuple of two elements corresponding
to type variables T1 and T2. Tuple[int, float, str] is a tuple
of an int, a float and a string.
To specify a variable-length tuple of homogeneous type, use Tuple[T, ...].
c O@ s1 t | t � r t d � � n t t | | | � S( Nu6 Type Tuple cannot be instantiated; use tuple() instead( R� R� R R� R. ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R( R� R1 R. R� R2 R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� � s
t CallableMetac B@ s8 e Z d Z d � Z d � Z d � Z e d � � Z RS( u Metaclass for Callable.c C@ s5 | j d k r" t t | � j � S| j | j � � S( N( R� R= R R� R' R� R| ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR' � s c C@ s� t | � t k r( t t | � j | � Sg } xQ | d D]E } t | t � sd | j t | � � q9 | j | d j | � � q9 W| d d k r� t | d � d | d St | d � d d j
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d � � n | \ } } | t k r� t | f } n7 t | t � s� t
d | f � � n t | � | f } | j
| � S( ux A thin wrapper around __getitem_inner__ to provide the latter
with hashable arguments to improve speed.
i u6 Callable must be used as Callable[[arg, ...], result].u8 Callable[args, result]: args must be a list. Got %.100r.N( R� R= R� R� R R� RO R R. R- R RY t listt __getitem_inner__( R R� R t result( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRO s " c @ s� | \ } } d � t | � � } | t k rI t t | � j t | f � Sd � t � f d � | D� � } | | f } t t | � j | � S( Nu. Callable[args, result]: result must be a type.u6 Callable[[arg, ...], result]: each arg must be a type.c 3@ s | ] } t | � � Vq d S( N( RA ( Rl R? ( RX ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pys <genexpr>+ s ( RA RY R R� RO R� R. ( R R� R R� ( ( RX s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� # s
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R� c B@ s, e Z d Z e Z e j Z d Z d � Z RS( u� Callable type; Callable[[int], str] is a function of (int) -> str.
The subscription syntax must always be used with exactly two
values: the argument list and the return type. The argument list
must be a list of types or ellipsis; the return type must be a single type.
There is no syntax to indicate optional or keyword arguments,
such function types are rarely used as callback types.
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c C@ s | S( u� Cast a value to a type.
This returns the value unchanged. To the type checker this
signals that the return value has the designated type, but at
runtime we intentionally don't check anything (we want this
to be as fast as possible).
( ( t typt val( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt castF s c
C@ s� | j } | j } | j } | | } | j p1 d } | j } | rO t | � n i } | t | � } x+ t | | | � D] \ } } | | | <qy W| S( u: Internal helper to extract the default arguments, by name.( ( t __code__t co_argcountt co_varnamest __defaults__t __kwdefaults__R� R- t zip(
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c C@ s d S( u: In Python 2 this is not supported and always returns None.N( R= ( RC R R! ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt get_type_hintsa s c C@ s� t | t � r� | j j � } x< | j j � D]+ \ } } | | j k r. | j | � q. q. WxQ | j � D]@ } t | t j � r� t
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r� n X| S( uI 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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This mutates the function(s) or class(es) in place.
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no_type_checkR ( R? t arg_attrst attrR� RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR� f s
c @ s" t j � � � f d � � } | S( u� Decorator to give another decorator the @no_type_check effect.
This wraps the decorator with something that wraps the decorated
function in @no_type_check.
c @ s � | | � } t | � } | S( N( R� ( R R R� ( t decorator( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt wrapped_decorator� s ( R� R� ( R� R� ( ( R� s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt no_type_check_decorator� s c O@ s t d � � d S( u* Helper for @overload to raise when called.u� 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( t NotImplementedError( R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt _overload_dummy� s c C@ s t S( u
Decorator for overloaded functions/methods.
In a stub file, place two or more stub definitions for the same
function in a row, each decorated with @overload. For example:
@overload
def utf8(value: None) -> None: ...
@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
In a non-stub file (i.e. a regular .py file), do the same but
follow it with an implementation. The implementation should *not*
be decorated with @overload. For example:
@overload
def utf8(value: None) -> None: ...
@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
def utf8(value):
# implementation goes here
( R ( R� ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt overload� s t
_ProtocolMetac B@ s) e Z d Z d � Z d � Z d � Z RS( u~ Internal metaclass for _Protocol.
This exists so _Protocol classes can be generic without deriving
from Generic.
c C@ s5 t | j k r% t t | � j | � St d � � d S( Nu+ Protocols cannot be used with isinstance().( RW R� R R RD R ( R RC ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyRD � s c @ sa | j s
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This implements a simple-minded structural issubclass check
(similar but more general than the one-offs in collections.abc
such as Hashable).
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ByteStringc B@ s e Z RS( ( R R% ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR q s t Listc B@ s e Z d Z e Z d � Z RS( c O@ s1 t | t � r t d � � n t t | | | � S( Nu4 Type List cannot be instantiated; use list() instead( R� R R R� R� ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR } s ( ( R R% R2 R� R� R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR y s R c B@ s e Z d Z e Z d � Z RS( c O@ s1 t | t � r t d � � n t t | | | � S( Nu2 Type Set cannot be instantiated; use set() instead( R� R R R� R� ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R2 R� R� R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s t FrozenSetc B@ s e Z d Z e Z d � Z RS( c O@ s1 t | t � r t d � � n t t | | | � S( Nu> Type FrozenSet cannot be instantiated; use frozenset() instead( R� R R R� R� ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R2 R� R� R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s t MappingViewc B@ s e Z d Z e j Z RS( ( ( R R% R2 R� R! R� ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR! � s t KeysViewc B@ s e Z d Z e j Z RS( ( ( R R% R2 R� R" R� ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR" � s t ItemsViewc B@ s e Z d Z e j Z RS( ( ( R R% R2 R� R# R� ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR# � s t
ValuesViewc B@ s e Z d Z e j Z RS( ( ( R R% R2 R� R$ R� ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR$ � s t Dictc B@ s e Z d Z e Z d � Z RS( c O@ s1 t | t � r t d � � n t t | | | � S( Nu4 Type Dict cannot be instantiated; use dict() instead( R� R% R R� R� ( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R2 R� R� R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR% � s t DefaultDictc B@ s e Z d Z e j Z d � Z RS( c O@ s4 t | t � r t d � � n t t j | | | � S( NuN Type DefaultDict cannot be instantiated; use collections.defaultdict() instead( R� R& R R� t collectionst defaultdict( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R2 R' R( R� R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR& � s t Generatorc B@ s e Z d Z e Z d � Z RS( c O@ s1 t | t � r t d � � n t t | | | � S( Nu@ Type Generator cannot be instantiated; create a subclass instead( R� R) R R� t _G_base( R R R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR � s ( ( R R% R2 R* R� R ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR) � s u CT_coRu t Typec B@ s e Z d Z d Z e Z RS( u� 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.
( ( R R% R( R2 R/ R� ( ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyR+ � s c C@ s� g | D] \ } } | | f ^ q } t j | g | D] \ } } | ^ q5 � } t | � | _ y% t j d � j j d d � | _ Wn t t
f k
r� n X| S( u� Typed version of namedtuple.
Usage::
Employee = typing.NamedTuple('Employee', [('name', str), 'id', int)])
This is equivalent to::
Employee = collections.namedtuple('Employee', ['name', 'id'])
The resulting class has one extra attribute: _field_types,
giving a dict mapping field names to types. (The field names
are in the _fields attribute, which is part of the namedtuple
API.)
i u __name__u __main__( R' t
namedtupleR� t _field_typesR R� R� Rm R% R� Rn ( t typenamet fieldst nRQ R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt
NamedTuple� s %+%c C@ s% d � } t | � | _ | | _ | S( u: 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):
# type: (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( N( ( R ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt new_type) s ( R R t
__supertype__( R R_ R2 ( ( s7 /opt/alt/python27/lib/python2.7/site-packages/typing.pyt NewType s t IOc B@ sO e Z d Z d Z e d � � Z e d � � Z e d � � Z e d � � Z e d � � Z
e d � � Z e d � � Z e d d � � Z
e d
� � Z e d d � � Z e d d � � Z e d
d � � Z e d � � Z e d � � Z e d d � � Z e d � � Z e d � � Z e d � � Z e d � � Z e d � � Z RS( u� Generic base class for TextIO and BinaryIO.
This is an abstract, generic version of the return of open().
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.
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