code: def __enter__(self):
      global_state.set_global_attribute("in_tf_graph_scope", True)
  
file_path: keras/keras/utils/backend_utils.py
imports: import sys
  from keras import backend
  from keras.backend.common import global_state
label_desc: Use image node_id 2 for calling the TFGraphScope obj's underlying member method code with example usage: obj.__enter__() without return types