runner.py 文件源码

def _import_module(self, module_name):
        logger.info('Importing module "%s"', module_name)
        file_ = None
        # Import the module
        try:
            file_, pathname, description = imp.find_module(module_name)

        except ImportError as e:
            msg = 'Failed to import module "{}": {}'.format(module_name, e)
            raise FlexerException(msg, type(e))

        # Do not allow using builtin modules as handlers
        _, _, module_type = description
        if file_ is None:
            if module_type == imp.C_BUILTIN:
                msg = ('Built-in module "{}" cannot be a handler module'
                       .format(module_name))
                raise FlexerException(msg, Exception)

        # Load the module
        try:
            module = imp.load_module(module_name, file_, pathname, description)

        except ImportError as e:
            msg = 'Failed to import module "{}": {}'.format(module_name, e)
            stack_trace = format_stack_trace(sys.exc_info())
            raise FlexerException(msg, type(e), stack_trace)

        except SyntaxError as e:
            stack_trace = (
                'File \"%s\", line %s\n\t%s' % (e.filename.split('/')[-1],
                                                e.lineno,
                                                e.text)
            )
            msg = 'Syntax error in module "{}": {}'.format(module_name, e)
            raise FlexerException(msg, type(e), stack_trace)

        except Exception as e:
            stack_trace = format_stack_trace(sys.exc_info())
            msg = 'Failed to initialise "{}": {}'.format(module_name, e)
            raise FlexerException(msg, type(e), stack_trace)

        finally:
            if file_ is not None:
                file_.close()

        return module


# utility methods