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� e f�R � @ s� d Z d d l m Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l m Z d d l Z d d d d d d d d d d d g Z d d � Z d d � Z d d d d d � Z d d d d � Z e d d d � � Z d d d � Z e j e j j e � d d � Z Gd d � d � Z Gd d � d � Z y? d d l Z d d l m Z d d d � Z e j e e � Wn e k r�Yn Xd! d � Z d d" d � Z d# d � Z d$ d � Z! d% d � Z" d& d � Z# d S)'z Utilities to support packages.� )�singledispatchN)� ModuleType� get_importer�iter_importers� get_loader� find_loader� walk_packages� iter_modules�get_data� ImpImporter� ImpLoader� read_code� extend_pathc C sb y | j } WnD t k rS | j | � } | d k r< d St j j | | � SYn X| | � Sd S)z'Return the finder-specific module spec.N)� find_spec�AttributeError� find_module� importlib�util�spec_from_loader)�finder�namer �loader� r �,/opt/alt/python34/lib64/python3.4/pkgutil.py� _get_spec s r c C sK d d l } | j d � } | t j j k r1 d S| j d � | j | � S)Nr � � )�marshal�readr r � MAGIC_NUMBER�load)�streamr �magicr r r r " s � c # s i d d � � x� t | | � D]� \ } } } | | | f V| r y t | � WnX t k r} | d k ry | | � n Yq� t k r� | d k r� | | � n � Yq� Xt t j | d d � p� g } � f d d � | D� } t | | d | � Dd Hq q Wd S)a� Yields (module_loader, name, ispkg) for all modules recursively on path, or, if path is None, all accessible modules. 'path' should be either None or a list of paths to look for modules in. 'prefix' is a string to output on the front of every module name on output. Note that this function must import all *packages* (NOT all modules!) on the given path, in order to access the __path__ attribute to find submodules. 'onerror' is a function which gets called with one argument (the name of the package which was being imported) if any exception occurs while trying to import a package. If no onerror function is supplied, ImportErrors are caught and ignored, while all other exceptions are propagated, terminating the search. Examples: # list all modules python can access walk_packages() # list all submodules of ctypes walk_packages(ctypes.__path__, ctypes.__name__+'.') c S s | | k r d Sd | | <d S)NTr )�p�mr r r �seenL s zwalk_packages.<locals>.seenN�__path__c s" g | ] } � | � s | � q Sr r )�.0r$ )r& r r � <listcomp>c s z!walk_packages.<locals>.<listcomp>�.)r � __import__� ImportError� Exception�getattr�sys�modulesr )�path�prefix�onerror�importerr �ispkgr )r& r r / s c c s� | d k r t � } n t t | � } i } xU | D]M } xD t | | � D]3 \ } } | | k rJ d | | <| | | f VqJ qJ Wq4 Wd S)a& Yields (module_loader, name, ispkg) for all submodules on path, or, if path is None, all top-level modules on sys.path. 'path' should be either None or a list of paths to look for modules in. 'prefix' is a string to output on the front of every module name on output. N� )r �mapr �iter_importer_modules)r1 r2 Z importers�yielded�ir r5 r r r r h s c C s t | d � s g S| j | � S)Nr )�hasattrr )r4 r2 r r r r8 � s r8 c c s� | j d k s% t j j | j � r) d Si } d d l } y t j | j � } Wn t k rk g } Yn X| j � x | D]} | j | � } | d k s} | | k r� q} n t j j | j | � } d } | rct j j | � rcd | k rc| } y t j | � } Wn t k r&g } Yn Xx9 | D]+ } | j | � } | d k r.d } Pq.q.Wq} n | r} d | k r} d | | <| | | f Vq} q} Wd S)Nr �__init__Fr* Tr6 ) r1 �os�isdir�inspect�listdir�OSError�sort� getmodulename�join) r4 r2 r9 r? � filenames�fn�modnamer1 r5 � dircontents�subnamer r r �_iter_file_finder_modules� s< % % rJ c C s6 t j � �$ t j d t � t j d � a Wd QXd S)N�ignore�imp)�warnings�catch_warnings� simplefilter�PendingDeprecationWarningr � import_modulerL r r r r � _import_imp� s rR c @ sC e Z d Z d Z d d d � Z d d d � Z d d d � Z d S) r a� PEP 302 Importer that wraps Python's "classic" import algorithm ImpImporter(dirname) produces a PEP 302 importer that searches that directory. ImpImporter(None) produces a PEP 302 importer that searches the current sys.path, plus any modules that are frozen or built-in. Note that ImpImporter does not currently support being used by placement on sys.meta_path. Nc C s$ t j d t � t � | | _ d S)Nz5This emulation is deprecated, use 'importlib' instead)rM �warn�DeprecationWarningrR r1 )�selfr1 r r r r< � s zImpImporter.__init__c C s� | j d � d } | | k r2 | j d k r2 d S| j d k rJ d } n t j j | j � g } y t j | | � \ } } } Wn t k r� d SYn Xt | | | | � S)Nr* r6 ���)�splitr1 r= �realpathrL r r, r )rU �fullnamer1 rI �file�filename�etcr r r r � s zImpImporter.find_moduler# c c s� | j d k s% t j j | j � r) d Si } d d l } y t j | j � } Wn t k rk g } Yn X| j � x | D]} | j | � } | d k s} | | k r� q} n t j j | j | � } d } | rct j j | � rcd | k rc| } y t j | � } Wn t k r&g } Yn Xx9 | D]+ } | j | � } | d k r.d } Pq.q.Wq} n | r} d | k r} d | | <| | | f Vq} q} Wd S)Nr r< Fr* Tr6 ) r1 r= r> r? r@ rA rB rC rD ) rU r2 r9 r? rE rF rG r1 r5 rH rI r r r r � s< % % zImpImporter.iter_modules)�__name__� __module__� __qualname__�__doc__r< r r r r r r r � s c @ s� e Z d Z d Z d Z Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d d � Z d d d � Z d d � Z d d d � Z d S)r zBPEP 302 Loader that wraps Python's "classic" import algorithm Nc C s? t j d t � t � | | _ | | _ | | _ | | _ d S)Nz5This emulation is deprecated, use 'importlib' instead)rM rS rT rR rZ r[ rY r\ )rU rY rZ r[ r\ r r r r< s zImpLoader.__init__c C sP | j � z% t j | | j | j | j � } Wd | j rK | j j � n X| S)N)�_reopenrL � load_modulerZ r[ r\ �close)rU rY �modr r r rb s % zImpLoader.load_modulec C s& t | d � � } | j � SWd QXd S)N�rb)�openr )rU �pathnamerZ r r r r s zImpLoader.get_datac C s� | j r| | j j r| | j d } | t j k rI t | j d � | _ q| | t j t j f k r| t | j d � | _ q| n d S)N� �rre ) rZ �closedr\ rL � PY_SOURCErf r[ � PY_COMPILED� C_EXTENSION)rU �mod_typer r r ra ! s zImpLoader._reopenc C sG | d k r | j } n+ | | j k rC t d | j | f � � n | S)Nz,Loader for module %s cannot handle module %s)rY r, )rU rY r r r � _fix_name) s zImpLoader._fix_namec C s# | j | � } | j d t j k S)Nrh )ro r\ rL � PKG_DIRECTORY)rU rY r r r � is_package1 s zImpLoader.is_packagec C s� | j | � } | j d k r� | j d } | t j k rd | j | � } t | | j d � | _ q� | t j k r� | j � z t | j � | _ Wd | j j � Xq� | t j k r� | j � j � | _ q� n | j S)Nrh �exec)ro �coder\ rL rk � get_source�compiler[ rl ra r rZ rc rp � _get_delegate�get_code)rU rY rn �sourcer r r rw 5 s zImpLoader.get_codec C s | j | � } | j d k r | j d } | t j k rn | j � z | j j � | _ Wd | j j � Xq | t j k r� t j j | j d d � � r� t | j d d � d � � } | j � | _ Wd QXq� q | t j k r | j � j � | _ q n | j S)Nrh r6 ri rV rV )ro rx r\ rL rk ra rZ r rc rl r= r1 �existsr[ rf rp rv rt )rU rY rn �fr r r rt F s zImpLoader.get_sourcec C s% t | j � } t | d � } | j S)Nr< )r r[ r r )rU r �specr r r rv X s zImpLoader._get_delegatec C sd | j | � } | j d } | t j k r; | j � j � S| t j t j t j f k r` | j Sd S)Nrh ) ro r\ rL rp rv � get_filenamerk rl rm r[ )rU rY rn r r r r| ] s zImpLoader.get_filename)r] r^ r_ r` rs rx r< rb r ra ro rq rw rt rv r| r r r r r s )� zipimporterc c sR t t j | j � } | j } t | � } i } d d l } x| D]} | j | � s_ qD n | | d � j t j � } t | � d k r� | d j d � r� | d | k r� d | | d <| d d f Vq� n t | � d k r� qD n | j | d � } | d k rqD n | rD d | k rD | | k rD d | | <| | d f VqD qD Wd S) Nr rh r6 z __init__.pyTr< r* F) �sorted� zipimport�_zip_directory_cache�archiver2 �lenr? � startswithrW r= �seprC ) r4 r2 ZdirlistZ_prefixZplenr9 r? rF rG r r r �iter_zipimport_modulesk s* % r� c C s} y t j | } Wne t k rx xP t j D]? } y$ | | � } t j j | | � PWq+ t k ri Yq+ Xq+ Wd } Yn X| S)a Retrieve a PEP 302 importer for the given path item The returned importer is cached in sys.path_importer_cache if it was newly created by a path hook. The cache (or part of it) can be cleared manually if a rescan of sys.path_hooks is necessary. N)r/ �path_importer_cache�KeyError� path_hooks� setdefaultr, )Z path_itemr4 � path_hookr r r r � s c c s� | j d � r- d j | � } t | � � n d | k r� | j d � d } t j | � } t | d d � } | d k r� d Sn t j Dd Ht j } x | D] } t | � Vq� Wd S)a� Yield PEP 302 importers for the given module name If fullname contains a '.', the importers will be for the package containing fullname, otherwise they will be all registered top level importers (i.e. those on both sys.meta_path and sys.path_hooks). If the named module is in a package, that package is imported as a side effect of invoking this function. If no module name is specified, all top level importers are produced. r* z'Relative module name {!r} not supportedr r' N) r� �formatr, � rpartitionr rQ r. r/ � meta_pathr1 r )rY �msgZpkg_nameZpkgr1 �itemr r r r � s c C s� | t j k r/ t j | } | d k r/ d Sn t | t � r� | } t | d d � } | d k rf | St | d d � d k r� d S| j } n | } t | � S)a Get a PEP 302 "loader" object for module_or_name Returns None if the module cannot be found or imported. If the named module is not already imported, its containing package (if any) is imported, in order to establish the package __path__. N� __loader__�__spec__)r/ r0 � isinstancer r. r] r )Zmodule_or_name�moduler rY r r r r � s c C s� | j d � r- d j | � } t | � � n y t j j | � } Wn[ t t t t f k r� } z/ d } t | j | t | � | � � | � WYd d } ~ Xn X| d k r� | j Sd S)z�Find a PEP 302 "loader" object for fullname This is a backwards compatibility wrapper around importlib.util.find_spec that converts most failures to ImportError and only returns the loader rather than the full spec r* z'Relative module name {!r} not supportedz,Error while finding loader for {!r} ({}: {})N) r� r� r, r r r r � TypeError� ValueError�typer )rY r� r{ Zexr r r r � s 7c C s: t | t � s | S| d } | d d � } | j d � \ } } } | r� y t j | j } Wq� t t f k r} | SYq� Xn t j } x�| D]�} t | t � s� q� n t | � } | d k r`g } t | d � r | j | � } | d k r0| j p g } q0n' t | d � r0| j | � \ } } n x- | D]" } | | k r7| j | � q7q7Wn t j j | | � } t j j | � r� y t | � } Wn? t k r�} z t j j d | | f � WYd d } ~ Xq2X| �N xF | D]> } | j d � } | s�| j d � rq�n | j | � q�WWd QXq� q� W| S) a� Extend a package's path. Intended use is to place the following code in a package's __init__.py: from pkgutil import extend_path __path__ = extend_path(__path__, __name__) This will add to the package's __path__ all subdirectories of directories on sys.path named after the package. This is useful if one wants to distribute different parts of a single logical package as multiple directories. It also looks for *.pkg files beginning where * matches the name argument. This feature is similar to *.pth files (see site.py), except that it doesn't special-case lines starting with 'import'. A *.pkg file is trusted at face value: apart from checking for duplicates, all entries found in a *.pkg file are added to the path, regardless of whether they are exist the filesystem. (This is a feature.) If the input path is not a list (as is the case for frozen packages) it is returned unchanged. The input path is not modified; an extended copy is returned. Items are only appended to the copy at the end. It is assumed that sys.path is a sequence. Items of sys.path that are not (unicode or 8-bit) strings referring to existing directories are ignored. Unicode items of sys.path that cause errors when used as filenames may cause this function to raise an exception (in line with os.path.isdir() behavior). z.pkgNr* r r zCan't open %s: %s � �#)r� �listr� r/ r0 r' r� r r1 �strr r; r �submodule_search_locationsr �appendr= rD �isfilerf rA �stderr�write�rstripr� )r1 r Z sname_pkgZparent_package�_Z final_nameZ search_path�dirr �portionsr{ ZportionZpkgfilerz r� �liner r r r � sP ! ! c C s� t j j | � } | d k r" d S| j } | d k sG t | d � rK d St j j | � pr t j j | � j � } | d k s� t | d � r� d S| j d � } | j d t j j | j � � t j j | � } | j | � S)af Get a resource from a package. This is a wrapper round the PEP 302 loader get_data API. The package argument should be the name of a package, in standard module format (foo.bar). The resource argument should be in the form of a relative filename, using '/' as the path separator. The parent directory name '..' is not allowed, and nor is a rooted name (starting with a '/'). The function returns a binary string, which is the contents of the specified resource. For packages located in the filesystem, which have already been imported, this is the rough equivalent of d = os.path.dirname(sys.modules[package].__file__) data = open(os.path.join(d, resource), 'rb').read() If the package cannot be located or loaded, or it uses a PEP 302 loader which does not support get_data(), then None is returned. Nr �__file__�/r )r r r r r; r/ r0 �get� _bootstrap� _SpecMethodsr rW �insertr= r1 �dirnamer� rD r )�packageZresourcer{ r rd �partsZ resource_namer r r r M s )$r` � functoolsr Z simplegenericr �importlib.util�importlib.machineryr= Zos.pathr/ �typesr rM �__all__r r r r r8 rJ �register� machinery� FileFinderrR r r r r} r� r, r r r r r r r r r r �<module> sJ 9( Jc ^
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