yt-dlp/devscripts/lazy_load_template.py
pukkandan 86e5f3ed2e
[cleanup] Upgrade syntax
Using https://github.com/asottile/pyupgrade

1. `__future__` imports and `coding: utf-8` were removed
2. Files were rewritten with `pyupgrade --py36-plus --keep-percent-format`
3. f-strings were cherry-picked from `pyupgrade --py36-plus`

Extractors are left untouched (except removing header) to avoid unnecessary merge conflicts
2022-04-12 05:32:51 +05:30

30 lines
965 B
Python

import re
from ..utils import bug_reports_message, write_string
class LazyLoadMetaClass(type):
def __getattr__(cls, name):
if '_real_class' not in cls.__dict__:
write_string(
f'WARNING: Falling back to normal extractor since lazy extractor '
f'{cls.__name__} does not have attribute {name}{bug_reports_message()}')
return getattr(cls._get_real_class(), name)
class LazyLoadExtractor(metaclass=LazyLoadMetaClass):
_module = None
_WORKING = True
@classmethod
def _get_real_class(cls):
if '_real_class' not in cls.__dict__:
mod = __import__(cls._module, fromlist=(cls.__name__,))
cls._real_class = getattr(mod, cls.__name__)
return cls._real_class
def __new__(cls, *args, **kwargs):
real_cls = cls._get_real_class()
instance = real_cls.__new__(real_cls)
instance.__init__(*args, **kwargs)
return instance