YfS* @ s d Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z m
Z
d d l m Z d d l m Z d d
l m
Z
d d l m Z d d
l m Z d d l Z d d l Z d d l Z d d l Z d d Z d d d Z d d d Z e d d Z d d Z d d Z d d Z Gd d d e j Z Gd d d e j Z Gd! d" d" e j Z d S)#z-Utility code for constructing importers, etc. )abc)module_from_spec)
_resolve_name)spec_from_loader)
_find_spec) MAGIC_NUMBER_BACKCOMPAT_MAGIC_NUMBER)cache_from_source)
decode_source)source_from_cache)spec_from_file_location )contextmanagerNc C sv | j d s | S| s. t d j | d } x% | D] } | d k rN P| d 7} q; Wt | | d | | S)z2Resolve a relative module name to an absolute one..z,{!r} is not a relative name (no leading dot)r
r N)
startswith
ValueErrorformatr )namepackagelevel character r 3/opt/alt/python35/lib64/python3.5/importlib/util.py resolve_name s
r c C s | t j k r t | | St j | } | d k r9 d Sy
| j } Wn* t k
rr t d j | d Yn& X| d k r t d j | | Sd S)a Return the spec for the specified module.
First, sys.modules is checked to see if the module was already imported. If
so, then sys.modules[name].__spec__ is returned. If that happens to be
set to None, then ValueError is raised. If the module is not in
sys.modules, then sys.meta_path is searched for a suitable spec with the
value of 'path' given to the finders. None is returned if no spec could
be found.
Dotted names do not have their parent packages implicitly imported. You will
most likely need to explicitly import all parent packages in the proper
order for a submodule to get the correct spec.
Nz{}.__spec__ is not setz{}.__spec__ is None)sysmodulesr __spec__AttributeErrorr r )r pathmodulespecr r r _find_spec_from_path# s
r! c C s | j d r t | | n | } | t j k r | j d d } | rq t | d d g } t | | j St | d Sn| t j | } | d k r d Sy
| j } Wn* t k
r t
d j | d Yn& X| d k r t
d j | | Sd S)a Return the spec for the specified module.
First, sys.modules is checked to see if the module was already imported. If
so, then sys.modules[name].__spec__ is returned. If that happens to be
set to None, then ValueError is raised. If the module is not in
sys.modules, then sys.meta_path is searched for a suitable spec with the
value of 'path' given to the finders. None is returned if no spec could
be found.
If the name is for submodule (contains a dot), the parent module is
automatically imported.
The name and package arguments work the same as importlib.import_module().
In other words, relative module names (with leading dots) work.
r r
fromlist__path__Nz{}.__spec__ is not setz{}.__spec__ is None) r r r r
rpartition
__import__r r# r r r r )r r fullname parent_nameparentr r r r r find_specB s" $
r) c c s | t j k } t j j | } | sO t t | } d | _ | t j | <zK y | VWn; t k
r | s y t j | =Wn t k
r Yn XYn XWd d | _ Xd S)NTF)r r gettype__initializing__ ExceptionKeyError)r is_reloadr r r r _module_to_loadj s
r0 c s% t j f d d } | S)zOSet __package__ on the returned module.
This function is deprecated.
c su t j d t d d | | } t | d d d k rq | j | _ t | d sq | j j d d | _ | S)Nz7The import system now takes care of this automatically.
stacklevel __package__r# r r
)warningswarnDeprecationWarninggetattr__name__r3 hasattrr$ )argskwargsr )fxnr r set_package_wrapper s
z(set_package.<locals>.set_package_wrapper) functoolswraps)r< r= r )r< r set_package s !
r@ c s% t j f d d } | S)zNSet __loader__ on the returned module.
This function is deprecated.
c sM t j d t d d | | | } t | d d d k rI | | _ | S)Nz7The import system now takes care of this automatically.r1 r2
__loader__)r4 r5 r6 r7 rA )selfr: r; r )r< r r set_loader_wrapper s
z&set_loader.<locals>.set_loader_wrapper)r> r? )r< rC r )r< r
set_loader s !rD c s; t j d t d d t j f d d } | S)a* Decorator to handle selecting the proper module for loaders.
The decorated function is passed the module to use instead of the module
name. The module passed in to the function is either from sys.modules if
it already exists or is a new module. If the module is new, then __name__
is set the first argument to the method, __loader__ is set to self, and
__package__ is set accordingly (if self.is_package() is defined) will be set
before it is passed to the decorated function (if self.is_package() does
not work for the module it will be set post-load).
If an exception is raised and the decorator created the module it is
subsequently removed from sys.modules.
The decorator assumes that the decorated function takes the module name as
the second argument.
z7The import system now takes care of this automatically.r1 r2 c s t | y } | | _ y | j | } Wn t t f k
rE Yn) X| rX | | _ n | j d d | _ | | | | SWd QRXd S)Nr r
)r0 rA
is_package ImportErrorr r3 r$ )rB r& r: r; r rE )r< r r module_for_loader_wrapper s z4module_for_loader.<locals>.module_for_loader_wrapper)r4 r5 r6 r> r? )r< rG r )r< r module_for_loader s
!rH c @ s e Z d Z d Z d S)_Modulez>A subclass of the module type to allow __class__ manipulation.N)r8
__module__ __qualname____doc__r r r r rI s rI c @ s. e Z d Z d Z d d Z d d Z d S) _LazyModulezKA subclass of the module type which triggers loading upon attribute access.c C s t | _ | j j } | j j } | j } i } x] | j D]O \ } } | | k rb | | | <q= t | | t | | k r= | | | <q= W| j j j | | t
j k r t | t t
j | k r d } t | j
| | j j | t | | S)z8Trigger the load of the module and return the attribute.zDmodule object for {!r} substituted in sys.modules during a lazy load)rI __class__r r loader_state__dict__itemsidloader exec_moduler r r r updater7 ) rB attr
original_name
attrs_then attrs_now
attrs_updatedkeyvaluemsgr r r __getattribute__ s"
z _LazyModule.__getattribute__c C s | j | t | | d S)z/Trigger the load and then perform the deletion.N)r^ delattr)rB rV r r r __delattr__ s
z_LazyModule.__delattr__N)r8 rJ rK rL r^ r` r r r r rM s "rM c @ s^ e Z d Z d Z e d d Z e d d Z d d Z d d Z d
d Z
d S)
LazyLoaderzKA loader that creates a module which defers loading until attribute access.c C s t | d s t d d S)NrT z loader must define exec_module())r9 TypeError)rS r r r __check_eager_loader s z LazyLoader.__check_eager_loaderc s j f d d S)z>Construct a callable which returns the eager loader made lazy.c s | | S)Nr )r: r; )clsrS r r <lambda> s z$LazyLoader.factory.<locals>.<lambda>) _LazyLoader__check_eager_loader)rd rS r )rd rS r factory s
zLazyLoader.factoryc C s | j | | | _ d S)N)rf rS )rB rS r r r __init__ s
zLazyLoader.__init__c C s
t | j S)z9Create a module which can have its __class__ manipulated.)rI r )rB r r r r
create_module s zLazyLoader.create_modulec C s= | j | j _ | j | _ | j j | j _ t | _ d S)z Make the module load lazily.N)rS r rA rP copyrO rM rN )rB r r r r rT s zLazyLoader.exec_moduleN) r8 rJ rK rL staticmethodrf classmethodrg rh ri rT r r r r ra s ra )!rL r
_bootstrapr r r r _bootstrap_externalr r r r
r r
contextlibr r> r typesr4 r r! r) r0 r@ rD rH
ModuleTyperI rM Loaderra r r r r <module> s2 ( '.