class_docstr: An abstract class to handle weights initialization and
  a simple interface for dowloading and loading pretrained models.
class_docstr_tok: ["An","abstract","class","to","handle","weights","initialization","and","a","simple","interface","for","dowloading","and","loading","pretrained","models","."]
code: def __init__(self):
      super().__init__()
      self.clip = None
  
imports: import torch
  import logging
  from typing import Union
  from torch import nn
  from towhee.models.clip4clip.until_module import PreTrainedModel, CrossEn
  from towhee.models.clip import CLIP, get_configs
label_desc: Use image node_id 1 to create a new CLIP4ClipPreTrainedModel object from inherited base classes: PreTrainedModel, nn with example: obj = CLIP4ClipPreTrainedModel()