human
Solve the following python programming problem given the following code:
def configure_app(config_path = None, project = None, default_config_path = None, default_settings = None, settings_initializer = None, settings_envvar = None, initializer = None, allow_extras = True, config_module_name = None, runner_name = None, on_configure = None) : 
    '
    :param project: should represent the canonical name for the project, generally
        the same name it assigned in distutils.
    :param default_config_path: the default location for the configuration file.
    :param default_settings: default settings to load (think inheritence).
    :param settings_initializer: a callback function which should return a string
        representing the default settings template to generate.
    :param initializer: a callback function which will be executed before the command
        is executed. It is passed a dictionary of various configuration attributes.
    ' 
    global __configured 
    project_filename = sanitize_name (project) 
    if (default_config_path is None) : 
        default_config_path = ('~/%s/%s.conf.py' % (project_filename, project_filename)) 
if (settings_envvar is None) : 
        settings_envvar = (project_filename.upper () + '_CONF') 
if (config_module_name is None) : 
        config_module_name = (project_filename + '_config') 
if (settings_envvar in os.environ) : 
        default_config_path = os.environ.get (settings_envvar) 
else : 
        default_config_path = os.path.normpath (os.path.abspath (os.path.expanduser (default_config_path))) 
if (not config_path) : 
        config_path = default_config_path 
config_path = os.path.expanduser (config_path) 
    if (not os.path.exists (config_path)) : 
        if runner_name : 
            raise ValueError (("Configuration file does not exist. Use '%s init' to initialize the file." % (runner_name,))) 
raise ValueError (('Configuration file does not exist at %r' % (config_path,))) 
os.environ ['DJANGO_SETTINGS_MODULE'] = config_module_name 
    def settings_callback(settings) : 
        if (initializer is None) : 
           ...

    
    

    Fix the buggy line: importer.install (config_module_name, runner_name, default_settings, allow_extras = allow_extras, callback = settings_callback)
assistant
#Here is Python program to fix the buggy line: importer.

importer.install (config_module_name, config_path, default_settings, allow_extras = allow_extras, callback = settings_callback)