tf error

gistfile1.txt

python3 Object_detection_picamera.py 
/usr/lib/python3.5/importlib/_bootstrap.py:222: RuntimeWarning: compiletime version 3.4 of module 'tensorflow.python.framework.fast_tensor_util' does not match runtime version 3.5
  return f(*args, **kwds)
/usr/lib/python3.5/importlib/_bootstrap.py:222: RuntimeWarning: builtins.type size changed, may indicate binary incompatibility. Expected 432, got 412
  return f(*args, **kwds)
Traceback (most recent call last):
  File "Object_detection_picamera.py", line 97, in <module>
    image_tensor = detection_graph.get_tensor_by_name('image_tensor:0')
  File "/home/pi/.local/lib/python3.5/site-packages/tensorflow/python/framework/ops.py", line 3789, in get_tensor_by_name
    return self.as_graph_element(name, allow_tensor=True, allow_operation=False)
  File "/home/pi/.local/lib/python3.5/site-packages/tensorflow/python/framework/ops.py", line 3613, in as_graph_element
    return self._as_graph_element_locked(obj, allow_tensor, allow_operation)
  File "/home/pi/.local/lib/python3.5/site-packages/tensorflow/python/framework/ops.py", line 3655, in _as_graph_element_locked
    "graph." % (repr(name), repr(op_name)))
KeyError: "The name 'image_tensor:0' refers to a Tensor which does not exist. The operation, 'image_tensor', does not exist in the graph."