-# flake8: noqa
-from __future__ import unicode_literals
-
+import importlib
+import random
import re
+from ..utils import bug_reports_message, classproperty, write_string
+
+
+class LazyLoadMetaClass(type):
+ def __getattr__(cls, name):
+ # "is_suitable" requires "_TESTS". However, they bloat the lazy_extractors
+ if '_real_class' not in cls.__dict__ and name not in ('is_suitable', 'get_testcases'):
+ write_string(
+ 'WARNING: Falling back to normal extractor since lazy extractor '
+ f'{cls.__name__} does not have attribute {name}{bug_reports_message()}\n')
+ return getattr(cls.real_class, name)
-class LazyLoadExtractor(object):
- _module = None
- @classmethod
- def ie_key(cls):
- return cls.__name__[:-2]
+class LazyLoadExtractor(metaclass=LazyLoadMetaClass):
+ @classproperty
+ def real_class(cls):
+ if '_real_class' not in cls.__dict__:
+ cls._real_class = getattr(importlib.import_module(cls._module), cls.__name__)
+ return cls._real_class
- def __new__(cls):
- mod = __import__(cls._module, fromlist=(cls.__name__,))
- real_cls = getattr(mod, cls.__name__)
- return real_cls.__new__(real_cls)
+ def __new__(cls, *args, **kwargs):
+ instance = cls.real_class.__new__(cls.real_class)
+ instance.__init__(*args, **kwargs)
+ return instance