docstr: Enter the context scope.
docstr_tok: ["Enter","the","context","scope","."]
code: def __enter__(self):
      r"""
      Enter the context scope.
      """
      if self._default_dtype is not None:
          self._old_default_dtype = torch.get_default_dtype()
          torch.set_default_dtype(self._default_dtype)
  
      def preprocess_after(f):
          @functools.wraps(f)
          def wrapper(module: torch.nn.Module, *args, **kwargs):
              f(module, *args, **kwargs)
              self._post_init_method(module, *args, **kwargs)
  
          return wrapper
  
      def _enable_class(cls):
          cls._old_init = cls.__init__
          cls.__init__ = preprocess_after(cls.__init__)
  
      # The function is called during init subclass.
      def _init_subclass(cls, **kwargs):
          cls.__init__ = preprocess_after(cls.__init__)
  
      # Replace .__init__() for all existing subclasses of torch.nn.Module
      # Execution self._post_init_method after the default init function.
      substitute_init_recursively(
          torch.nn.modules.module.Module, _enable_class, set()
      )
  
      # holding on to the current __init__subclass__ for exit
      torch.nn.modules.module.Module._old_init_subclass = (
          torch.nn.modules.module.Module.__init_subclass__
      )
      # Replace .__init__() for future subclasses of torch.nn.Module
      torch.nn.modules.module.Module.__init_subclass__ = classmethod(
          _init_subclass
      )
  
      self._pre_context_exec()
      return self
  
file_path: ColossalAI/colossalai/utils/model/utils.py
imports: import functools
  from typing import Optional
  import torch
label_desc: Use image node_id 2 for calling the InsertPostInitMethodToModuleSubClasses obj's underlying member method code with example usage: obj.__enter__() and returns: self, wrapper