e fR @sdZddlmZddlZddlZddlZddlZddlZddl Z ddl m Z ddl Z ddddd d d d d ddg Z ddZddZddddd Zdddd ZedddZdddZejejjeddZGdd d ZGdd d Zy?ddlZddlmZddd ZejeeWnek rYnXd!dZdd"dZd#dZ d$dZ!d%dZ"d&d Z#dS)'zUtilities to support packages.)singledispatchN) ModuleType get_importeriter_importers get_loader find_loader walk_packages iter_modulesget_data ImpImporter ImpLoader read_code extend_pathc Csby |j}WnDtk rS|j|}|dkr<dStjj||SYn X||SdS)z'Return the finder-specific module spec.N) find_specAttributeError find_module importlibutilspec_from_loader)findernamerloaderr,/opt/alt/python34/lib64/python3.4/pkgutil.py _get_specs   rcCsKddl}|jd}|tjjkr1dS|jd|j|S)Nr)marshalreadrr MAGIC_NUMBERload)streamrmagicrrrr "s   c #siddxt||D]\}}}|||fV|ryt|WnXtk r}|dk ry||nYqtk r|dk r||nYqXttj|ddpg}fdd|D}t||d|DdHqqWdS)aYields (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. 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The cache (or part of it) can be cleared manually if a rescan of sys.path_hooks is necessary. N)r/path_importer_cacheKeyError path_hooks setdefaultr,)Z path_itemr4 path_hookrrrrs      ccs|jdr-dj|}t|nd|kr|jdd}tj|}t|dd}|dkrdSntjDdHtj }x|D]}t |VqWdS)aYield 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 supportedrr'N) rformatr, rpartitionrrQr.r/ meta_pathr1r)rYmsgZpkg_nameZpkgr1itemrrrrs      cCs|tjkr/tj|}|dkr/dSnt|tr|}t|dd}|dk rf|St|dddkrdS|j}n|}t|S)aGet 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 isinstancerr.r]r)Zmodule_or_namemodulerrYrrrrs    cCs|jdr-dj|}t|nytjj|}Wn[ttttfk r}z/d}t|j|t |||WYdd}~XnX|dk r|j SdS)zFind 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) rrr,rrrr TypeError ValueErrortyper)rYrr{Zexrrrrs7cCs:t|ts|S|d}|dd}|jd\}}}|rytj|j}Wqttfk r}|SYqXn tj}x|D]}t|t sqnt |}|dk r`g} t |dr |j |} | dk r0| j pg} q0n't |dr0|j|\}} nx-| D]"} | |kr7|j| q7q7Wntjj||} tjj| ryt| } Wn?tk r}ztjjd| |fWYdd}~Xq2X| NxF| D]>}|jd}| s|jdrqn|j|qWWdQXqqW|S) aExtend 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*rrzCan't open %s: %s  #)rlistrr/r0r'rrr1strrr;rsubmodule_search_locationsrappendr=rDisfilerfrAstderrwriterstripr)r1rZ sname_pkgZparent_package_Z final_nameZ search_pathdirrportionsr{ZportionZpkgfilerzrlinerrrrsP!          ! cCstjj|}|dkr"dS|j}|dksGt|d rKdStjj|prtjj |j }|dkst|d rdS|j d}|j dt jj|jt jj|}|j|S)afGet 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)rrrrr;r/r0get _bootstrap _SpecMethodsr rWinsertr=r1dirnamerrDr )packageZresourcer{rrdpartsZ resource_namerrrr Ms  )$r` functoolsrZ simplegenericrimportlib.utilimportlib.machineryr=Zos.pathr/typesrrM__all__rr rr r8rJregister machinery FileFinderrRr r rr}rr,rrrrrr rrrrsJ           9( Jc      ^