human
Solve the following python programming problem given the following code:
def __enter__(self) : 
    'Enable caching of setup requirements (by patching the ``run_egg_info()`` method).' 
    if (self.patch is None) : 
        created_links = self.created_links 
        original_method = InstallRequirement.run_egg_info 
        shared_directory = shared_directory.config.eggs_cache 
        def run_egg_info_wrapper(self, * args, **kw) : 
            link_name = os.path.join (self.source_dir, '.eggs') 
            try : 
                logger.debug ('Creating symbolic link: %s -> %s', link_name, shared_directory) 
                os.symlink (shared_directory, link_name) 
                if (created_links is not None) : 
                    created_links.append (link_name) 
except Exception as e : 
                logger.debug ('Failed to create symbolic link! (continuing without)', exc_info = (not isinstance (e, AttributeError))) 
return original_method (self, * args, ** kw) 
self.patch = PatchedAttribute (InstallRequirement, 'run_egg_info', run_egg_info_wrapper) 
        self.patch.__enter__ () 

    
    

    Fix the buggy line: shared_directory = shared_directory.config.eggs_cache
assistant
#Here is Python program to fix the buggy line: shared_directory = shared_directory.

shared_directory = self.config.eggs_cache