code: def is_tensor(tensor):
      return isinstance(tensor, tf.Tensor) or isinstance(
          tensor, tf.Variable
      )
  
file_path: tensorly/tensorly/backend/tensorflow_backend.py
imports: import numpy
  from .core import Backend, backend_types, backend_basic_math, backend_array
label_desc: Use image node_id 3 for calling the TensorflowBackend obj's underlying member method code with example usage: obj.is_tensor(tensor) and returns: unknown