class_docstr: Basic Reader Class
class_docstr_tok: ["Basic","Reader","Class"]
code: def __contains__(self, key):
      return key in self.index_dict
  
imports: import cvtransforms
  import face_alignment
  import numpy
  import skimage.transform
  import skvideo.io
  import torch
  from models import pretrained
label_desc: Use image node_id 7 for calling the VideoReader obj's underlying member method code with example usage: obj.__contains__(key) and returns: unknown