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ihooks.pyo
� z fc @ s� d Z d d l m Z m Z e d d d �[ d d l Z d d l Z d d l Z d d l Z d d d d d d d d g Z d Z d d l m Z m Z m Z d d l m Z m Z m Z e Z e Z d d d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d Z d a d d � Z d � Z d S( s, Import hook support. Consistent use of this module will make it possible to change the different mechanisms involved in loading modules independently. While the built-in module imp exports interfaces to the built-in module searching and loading algorithm, and it is possible to replace the built-in function __import__ in order to change the semantics of the import statement, until now it has been difficult to combine the effect of different __import__ hacks, like loading modules from URLs by rimport.py, or restricted execution by rexec.py. This module defines three new concepts: 1) A "file system hooks" class provides an interface to a filesystem. One hooks class is defined (Hooks), which uses the interface provided by standard modules os and os.path. It should be used as the base class for other hooks classes. 2) A "module loader" class provides an interface to search for a module in a search path and to load it. It defines a method which searches for a module in a single directory; by overriding this method one can redefine the details of the search. If the directory is None, built-in and frozen modules are searched instead. Two module loader class are defined, both implementing the search strategy used by the built-in __import__ function: ModuleLoader uses the imp module's find_module interface, while HookableModuleLoader uses a file system hooks class to interact with the file system. Both use the imp module's load_* interfaces to actually load the module. 3) A "module importer" class provides an interface to import a module, as well as interfaces to reload and unload a module. It also provides interfaces to install and uninstall itself instead of the default __import__ and reload (and unload) functions. One module importer class is defined (ModuleImporter), which uses a module loader instance passed in (by default HookableModuleLoader is instantiated). The classes defined here should be used as base classes for extended functionality along those lines. If a module importer class supports dotted names, its import_module() must return a different value depending on whether it is called on behalf of a "from ... import ..." statement or not. (This is caused by the way the __import__ hook is used by the Python interpreter.) It would also do wise to install a different version of reload(). i����( t warnpy3kt warns0 the ihooks module has been removed in Python 3.0t stackleveli Nt BasicModuleLoadert Hookst ModuleLoadert FancyModuleLoadert BasicModuleImportert ModuleImportert installt uninstalli ( t C_EXTENSIONt PY_SOURCEt PY_COMPILED( t C_BUILTINt PY_FROZENt PKG_DIRECTORYt _Verbosec B s8 e Z e d � Z d � Z d � Z d � Z d � Z RS( c C s | | _ d S( N( t verbose( t selfR ( ( s /usr/lib64/python2.7/ihooks.pyt __init__K s c C s | j S( N( R ( R ( ( s /usr/lib64/python2.7/ihooks.pyt get_verboseN s c C s | | _ d S( N( R ( R R ( ( s /usr/lib64/python2.7/ihooks.pyt set_verboseQ s c G s | j r | j | � n d S( N( R t message( R t args( ( s /usr/lib64/python2.7/ihooks.pyt noteV s c G s | r | | GHn | GHd S( N( ( R t formatR ( ( s /usr/lib64/python2.7/ihooks.pyR Z s ( t __name__t __module__t VERBOSER R R R R ( ( ( s /usr/lib64/python2.7/ihooks.pyR I s c B s> e Z d Z d d � Z d � Z d � Z d � Z d � Z RS( s; Basic module loader. This provides the same functionality as built-in import. It doesn't deal with checking sys.modules -- all it provides is find_module() and a load_module(), as well as find_module_in_dir() which searches just one directory, and can be overridden by a derived class to change the module search algorithm when the basic dependency on sys.path is unchanged. The interface is a little more convenient than imp's: find_module(name, [path]) returns None or 'stuff', and load_module(name, stuff) loads the module. c C sS | d k r" d g | j � } n x* | D]" } | j | | � } | r) | Sq) Wd S( N( t Nonet default_patht find_module_in_dir( R t namet patht dirt stuff( ( s /usr/lib64/python2.7/ihooks.pyt find_moduler s c C s t j S( N( t sysR" ( R ( ( s /usr/lib64/python2.7/ihooks.pyR z s c C sI | d k r | j | � Sy t j | | g � SWn t k rD d SXd S( N( R t find_builtin_modulet impR% t ImportError( R R! R# ( ( s /usr/lib64/python2.7/ihooks.pyR } s c C sN t j | � r% d d d d t f f St j | � rJ d d d d t f f Sd S( Nt ( R( t is_builtinR t BUILTIN_MODULEt is_frozent FROZEN_MODULE( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR' � s c C sD | \ } } } z t j | | | | � SWd | r? | j � n Xd S( N( R( t load_modulet close( R R! R$ t filet filenamet info( ( s /usr/lib64/python2.7/ihooks.pyR/ � s N( R R t __doc__R R% R R R' R/ ( ( ( s /usr/lib64/python2.7/ihooks.pyR a s c B s� e Z d Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d d � Z d d � Z d d � Z d d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z e Z d � Z e j Z RS( s� Hooks into the filesystem and interpreter. By deriving a subclass you can redefine your filesystem interface, e.g. to merge it with the URL space. This base class behaves just like the native filesystem. c C s t j � S( N( R( t get_suffixes( R ( ( s /usr/lib64/python2.7/ihooks.pyR5 � R* c C s t j | � S( N( R( t new_module( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR6 � R* c C s t j | � S( N( R( R+ ( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR+ � R* c C s t j | � S( N( R( t init_builtin( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR7 � R* c C s t j | � S( N( R( R- ( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR- � R* c C s t j | � S( N( R( t init_frozen( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR8 � R* c C s t j | � S( N( R( t get_frozen_object( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR9 � R* c C s t j | | | � S( N( R( t load_source( R R! R2 R1 ( ( s /usr/lib64/python2.7/ihooks.pyR: � s c C s t j | | | � S( N( R( t load_compiled( R R! R2 R1 ( ( s /usr/lib64/python2.7/ihooks.pyR; � s c C s t j | | | � S( N( R( t load_dynamic( R R! R2 R1 ( ( s /usr/lib64/python2.7/ihooks.pyR< � s c C s t j | | | d d t f � S( NR* ( R( R/ R ( R R! R2 R1 ( ( s /usr/lib64/python2.7/ihooks.pyt load_package� s c C s; | j � } | | k r | | S| j | � | | <} | S( N( t modules_dictR6 ( R R! t dt m( ( s /usr/lib64/python2.7/ihooks.pyt add_module� s c C s t j S( N( R& t modules( R ( ( s /usr/lib64/python2.7/ihooks.pyR> � R* c C s t j S( N( R& R" ( R ( ( s /usr/lib64/python2.7/ihooks.pyR � R* c C s t j j | � S( N( t osR" t split( R t x( ( s /usr/lib64/python2.7/ihooks.pyt path_split� R* c C s t j j | | � S( N( RC R" t join( R RE t y( ( s /usr/lib64/python2.7/ihooks.pyt path_join� R* c C s t j j | � S( N( RC R" t isabs( R RE ( ( s /usr/lib64/python2.7/ihooks.pyt path_isabs� R* c C s t j j | � S( N( RC R" t exists( R RE ( ( s /usr/lib64/python2.7/ihooks.pyt path_exists� R* c C s t j j | � S( N( RC R" t isdir( R RE ( ( s /usr/lib64/python2.7/ihooks.pyt path_isdir� R* c C s t j j | � S( N( RC R" t isfile( R RE ( ( s /usr/lib64/python2.7/ihooks.pyt path_isfile� R* c C s t j j | � S( N( RC R" t islink( R RE ( ( s /usr/lib64/python2.7/ihooks.pyt path_islink� R* c G s t | � S( N( t open( R RE ( ( s /usr/lib64/python2.7/ihooks.pyt openfile� R* c C s t j | � S( N( RC t listdir( R RE ( ( s /usr/lib64/python2.7/ihooks.pyRV � R* N( R R R4 R5 R6 R+ R7 R- R8 R9 R R: R; R< R= RA R> R RF RI RK RM RO RQ RS RU t IOErrort openfile_errorRV RC t errort listdir_error( ( ( s /usr/lib64/python2.7/ihooks.pyR � s4 c B s_ e Z d Z d e d � Z d � Z d � Z d � Z d � Z d � Z d d � Z d � Z RS( s� Default module loader; uses file system hooks. By defining suitable hooks, you might be able to load modules from other sources than the file system, e.g. from compressed or encrypted files, tar files or (if you're brave!) URLs. c C s) t j | | � | p t | � | _ d S( N( R R R t hooks( R R[ R ( ( s /usr/lib64/python2.7/ihooks.pyR � s c C s | j j � S( N( R[ R ( R ( ( s /usr/lib64/python2.7/ihooks.pyR � s c C s | j j � S( N( R[ R> ( R ( ( s /usr/lib64/python2.7/ihooks.pyR> � s c C s | j S( N( R[ ( R ( ( s /usr/lib64/python2.7/ihooks.pyt get_hooks� s c C s | | _ d S( N( R[ ( R R[ ( ( s /usr/lib64/python2.7/ihooks.pyt set_hooks� s c C sT | j j | � r( d d d d t f f S| j j | � rP d d d d t f f Sd S( NR* ( R[ R+ R R, R- R. ( R R! ( ( s /usr/lib64/python2.7/ihooks.pyR' � s i c C s | d k r | j | � S| r� | j j | | � } | j j | � r� | j d | d � } | r� | d } | r~ | j � n d | d d t f f Sq� n x | j j � D]n } | \ } } } | j j | | | � } y& | j j | | � } | | | f SWq� | j j k rq� Xq� Wd S( NR i R* ( R R' R[ RI RO R R0 R R5 RU RX ( R R! R# t allow_packagest fullnameR$ R1 R3 t sufft modet typet fp( ( s /usr/lib64/python2.7/ihooks.pyR � s( c C s- | \ } } } | \ } } } z� | t k r= | j j | � S| t k rY | j j | � S| t k r� | j j | | | � } n� | t k r� | j j | | | � } na | t k r� | j j | | | � } n: | t k r� | j j | | | � } n t d | | f � Wd | r | j � n X| | _ | S( Ns$ Unrecognized module type (%r) for %s( R, R[ R7 R. R8 R R< R R: R R; R R= R) R0 t __file__( R R! R$ R1 R2 R3 R` Ra Rb R@ ( ( s /usr/lib64/python2.7/ihooks.pyR/ s* N( R R R4 R R R R R> R\ R] R' R R/ ( ( ( s /usr/lib64/python2.7/ihooks.pyR � s c B s e Z d Z d � Z RS( s8 Fancy module loader -- parses and execs the code itself.c B s� | \ } } \ } } } | } d } | e k r� | j d | d � } | s[ e d | � n | \ } } } | \ } } } | e e f k r� | r� | j � n e d | | f � n | g } | } | } | } n | e k r� | j j | � } nw | e k r*d d l } | j d � | j | � } n@ | e k rW| j � } e | | d � } n e j | | | � S| j j | � } | r�| | _ n | | _ y | | j UWn/ | j j � } | | k r�| | =n � n X| S( NR i s No __init__ module in package %ss/ Bad type (%r) for __init__ module in package %si����i t exec( R R R R) R R R0 R. R[ R9 t marshalt seekt loadt readt compileR R/ RA t __path__Rd t __dict__R> ( R R! R$ R1 R2 R` Ra Rb t realfilenameR" t initstufft initfilet initfilenamet initinfot initsufft initmodet inittypet codeRf t dataR@ R? ( ( s /usr/lib64/python2.7/ihooks.pyR/ " sR ( R R R4 R/ ( ( ( s /usr/lib64/python2.7/ihooks.pyR s c B sz e Z d Z d e d � Z d � Z d � Z d � Z d � Z i i g d � Z d d � Z d � Z d � Z d � Z RS( ss Basic module importer; uses module loader. This provides basic import facilities but no package imports. c C s> t j | | � | p" t d | � | _ | j j � | _ d S( N( R R R R t loaderR> RB ( R Rw R ( ( s /usr/lib64/python2.7/ihooks.pyR Y s c C s | j S( N( Rw ( R ( ( s /usr/lib64/python2.7/ihooks.pyt get_loader^ s c C s | | _ d S( N( Rw ( R Rw ( ( s /usr/lib64/python2.7/ihooks.pyt set_loadera s c C s | j j � S( N( Rw R\ ( R ( ( s /usr/lib64/python2.7/ihooks.pyR\ d s c C s | j j | � S( N( Rw R] ( R R[ ( ( s /usr/lib64/python2.7/ihooks.pyR] g s c C sa t | � } | | j k r& | j | S| j j | � } | sN t d | � n | j j | | � S( Ns No module named %s( t strRB Rw R% R) R/ ( R R! t globalst localst fromlistR$ ( ( s /usr/lib64/python2.7/ihooks.pyt import_modulej s c C sM t | j � } | j j | | � } | s: t d | � n | j j | | � S( Ns Module %s not found for reload( Rz R Rw R% R) R/ ( R t moduleR" R! R$ ( ( s /usr/lib64/python2.7/ihooks.pyt reloads s c C s | j t | j � =d S( N( RB Rz R ( R R ( ( s /usr/lib64/python2.7/ihooks.pyt unloadz s c C sg t j | _ t j | _ t t d � s3 d t _ n t j | _ | j t _ | j t _ | j t _ d S( NR� ( t __builtin__t __import__t save_import_moduleR� t save_reloadt hasattrR R� t save_unloadR~ ( R ( ( s /usr/lib64/python2.7/ihooks.pyR ~ s c C s: | j t _ | j t _ | j t _ t j s6 t ` n d S( N( R� R� R� R� R� R� R� ( R ( ( s /usr/lib64/python2.7/ihooks.pyR � s N( R R R4 R R R Rx Ry R\ R] R~ R� R� R R ( ( ( s /usr/lib64/python2.7/ihooks.pyR Q s c B sb e Z d Z d d d d d � Z d d � Z d � Z d � Z d d � Z d d � Z d � Z RS( s) A module importer that supports packages.i����c C sr | j | | � } | j | t | � � \ } } | j | | � } | sL | St | d � rn | j | | � n | S( NRk ( t determine_parentt find_head_packageRz t load_tailR� t ensure_fromlist( R R! R{ R| R} t levelt parentt qt tailR@ ( ( s /usr/lib64/python2.7/ihooks.pyR~ � s c C s� | s | r d S| j d � } | d k rO | r� | d k r� t d � q� n� | j d � } | d k rn d Sd | k r� | } nE d | k r� | d k r� t d � n d | d <d S| j d � d } | | d <| d k rMt | � } xS t | d d � D]? } y | j d d | � } Wq� t k r;t d � � q� Xq� W| | } n y t j | SWnB t k r�| d k r�t d | t d � d St d | � n Xd S( Nt __package__i s( Attempted relative import in non-packageR Rk t .i i����s2 attempted relative import beyond top-level packages; Parent module '%s' not found while handling absolute imports= Parent module '%s' not loaded, cannot perform relative import( R t gett ValueErrort rpartitiont lent ranget rindexR& RB t KeyErrorR t RuntimeWarningt SystemError( R R{ R� t pkgnamet modnamet dotRE ( ( s /usr/lib64/python2.7/ihooks.pyR� � sF c C s� d | k r6 | j d � } | | } | | d } n | } d } | r^ d | j | f } n | } | j | | | � } | r� | | f S| r� | } d } | j | | | � } | r� | | f Sn t d | � d S( NR� i R* s %s.%ss No module named '%s'( t findR t import_itR R) ( R R� R! t it headR� t qnameR� ( ( s /usr/lib64/python2.7/ihooks.pyR� � s& c C s� | } x� | r� | j d � } | d k r9 t | � } n | | | | d } } d | j | f } | j | | | � } | s t d | � q q W| S( NR� i i s %s.%ss No module named '%s'( R� R� R R� R) ( R R� R� R@ R� R� t mname( ( s /usr/lib64/python2.7/ihooks.pyR� � s i c C s� x� | D]� } | d k r\ | s y | j } Wn t k r? qV X| j | | d � q q n | d k r t | | � r d | j | f } | j | | | � } | s� t d | � q� q q Wd S( Nt *i s %s.%ss No module named '%s'( t __all__t AttributeErrorR� R� R R� R) ( R R@ R} t recursivet subt allt subnamet submod( ( s /usr/lib64/python2.7/ihooks.pyR� � s c C s� | s | S| s6 y | j | SWq6 t k r2 q6 Xn y | oE | j } Wn t k r] d SXt | � } | j j | | � } | s� d St | � } | j j | | � } | r� t | | | � n | S( N( RB R� Rk R� R Rz Rw R% R/ t setattr( R t partnamet fqnameR� t force_loadR" R$ R@ ( ( s /usr/lib64/python2.7/ihooks.pyR� � s( c C s{ t | j � } d | k r4 | j | | d d d �S| j d � } | | } | j | } | j | | d | | d d �S( NR� R� i ( Rz R R� R t rfindRB ( R R R! R� t pnameR� ( ( s /usr/lib64/python2.7/ihooks.pyR� s N( R R R4 R R~ R� R� R� R� R� R� ( ( ( s /usr/lib64/python2.7/ihooks.pyR � s - c C s# | p t p t � a t j � d S( N( t default_importerR t current_importerR ( t importer( ( s /usr/lib64/python2.7/ihooks.pyR # s c C s t j � d S( N( R� R ( ( ( s /usr/lib64/python2.7/ihooks.pyR ( s ( ( R4 t warningsR R R� R( RC R& R� R R R R R R R R, R. R R R R R R R R R� R� R R ( ( ( s /usr/lib64/python2.7/ihooks.pyt <module>3 s2 58P3?�
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