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Edit File: ihooks.pyc
� 2Y~gc @ 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+ /opt/alt/python27/lib64/python2.7/ihooks.pyt __init__K s c C s | j S( N( R ( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyt get_verboseN s c C s | | _ d S( N( R ( R R ( ( s+ /opt/alt/python27/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+ /opt/alt/python27/lib64/python2.7/ihooks.pyt noteV s c G s | r | | GHn | GHd S( N( ( R t formatR ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR Z s ( t __name__t __module__t VERBOSER R R R R ( ( ( s+ /opt/alt/python27/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+ /opt/alt/python27/lib64/python2.7/ihooks.pyt find_moduler s c C s t j S( N( t sysR" ( R ( ( s+ /opt/alt/python27/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! 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This base class behaves just like the native filesystem. c C s t j � S( N( R( t get_suffixes( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR5 � R* c C s t j | � S( N( R( t new_module( R R! ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR6 � R* c C s t j | � S( N( R( R+ ( R R! ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR+ � R* c C s t j | � S( N( R( t init_builtin( R R! ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR7 � R* c C s t j | � S( N( R( R- ( R R! ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR- � R* c C s t j | � S( N( R( t init_frozen( R R! ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR8 � R* c C s t j | � S( N( R( t get_frozen_object( R R! ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR9 � R* c C s t j | | | � S( N( R( t load_source( R R! R2 R1 ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR: � s c C s t j | | | � S( N( R( t load_compiled( R R! 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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+ /opt/alt/python27/lib64/python2.7/ihooks.pyR � s c C s | j j � S( N( R[ R ( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR � s c C s | j j � S( N( R[ R> ( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR> � s c C s | j S( N( R[ ( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyt get_hooks� s c C s | | _ d S( N( R[ ( R R[ ( ( s+ /opt/alt/python27/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! 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R$ R1 R2 R3 R` Ra Rb R@ ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR/ s* N( R R R4 R R R R R> R\ R] R' R R/ ( ( ( s+ /opt/alt/python27/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+ /opt/alt/python27/lib64/python2.7/ihooks.pyR/ " sR ( R R R4 R/ ( ( ( s+ /opt/alt/python27/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+ /opt/alt/python27/lib64/python2.7/ihooks.pyR Y s c C s | j S( N( Rw ( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyt get_loader^ s c C s | | _ d S( N( Rw ( R Rw ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyt set_loadera s c C s | j j � S( N( Rw R\ ( R ( ( s+ /opt/alt/python27/lib64/python2.7/ihooks.pyR\ d s c C s | j j | � S( N( Rw R] ( R R[ ( ( s+ /opt/alt/python27/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+ /opt/alt/python27/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+ /opt/alt/python27/lib64/python2.7/ihooks.pyt reloads s c C s | j t | j � =d S( N( RB Rz R ( R R ( ( s+ /opt/alt/python27/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+ /opt/alt/python27/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+ /opt/alt/python27/lib64/python2.7/ihooks.pyR � s N( R R R4 R R R Rx Ry R\ R] R~ R� R� R R ( ( ( s+ /opt/alt/python27/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! 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