devscripts/lazy_load_template.py

   1 # coding: utf-8
   2 import re
   3
   4
   5 class LazyLoadMetaClass(type):
   6     def __getattr__(cls, name):
   7         return getattr(cls._get_real_class(), name)
   8
   9
  10 class LazyLoadExtractor(metaclass=LazyLoadMetaClass):
  11     _module = None
  12
  13     @classmethod
  14     def _get_real_class(cls):
  15         if '__real_class' not in cls.__dict__:
  16             mod = __import__(cls._module, fromlist=(cls.__name__,))
  17             cls.__real_class = getattr(mod, cls.__name__)
  18         return cls.__real_class
  19
  20     def __new__(cls, *args, **kwargs):
  21         real_cls = cls._get_real_class()
  22         instance = real_cls.__new__(real_cls)
  23         instance.__init__(*args, **kwargs)
  24         return instance