运行报错NotFoundError : Key regression/Variable not found in checkpoint

Traceback (most recent call last):

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 1322, in _do_call

    return fn(*args)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 1307, in _run_fn

    options, feed_dict, fetch_list, target_list, run_metadata)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 1409, in _call_tf_sessionrun

    run_metadata)

tensorflow.python.framework.errors_impl.NotFoundError: Key regression/Variable not found in checkpoint

[[Node: save/RestoreV2 = RestoreV2[dtypes=[DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_save/Const_0_0, save/RestoreV2/tensor_names, save/RestoreV2/shape_and_slices)]]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:/Users/Invisible/PycharmProjects/mnist_testdemo/main.py", line 18, in <module>

    saver.restore(sess, "mnist/data/regression.ckpt")

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 1768, in restore

    six.reraise(exception_type, exception_value, exception_traceback)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\six.py", line 693, in reraise

    raise value

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 1752, in restore

    {self.saver_def.filename_tensor_name: save_path})

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 900, in run

    run_metadata_ptr)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 1135, in _run

    feed_dict_tensor, options, run_metadata)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 1316, in _do_run

    run_metadata)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\client\session.py", line 1335, in _do_call

    raise type(e)(node_def, op, message)

tensorflow.python.framework.errors_impl.NotFoundError: Key regression/Variable not found in checkpoint

[[Node: save/RestoreV2 = RestoreV2[dtypes=[DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_save/Const_0_0, save/RestoreV2/tensor_names, save/RestoreV2/shape_and_slices)]]

Caused by op 'save/RestoreV2', defined at:

  File "C:/Users/Invisible/PycharmProjects/mnist_testdemo/main.py", line 17, in <module>

    saver = tf.train.Saver(variables)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 1284, in __init__

    self.build()

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 1296, in build

    self._build(self._filename, build_save=True, build_restore=True)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 1333, in _build

    build_save=build_save, build_restore=build_restore)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 781, in _build_internal

    restore_sequentially, reshape)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 400, in _AddRestoreOps

    restore_sequentially)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\training\saver.py", line 832, in bulk_restore

    return io_ops.restore_v2(filename_tensor, names, slices, dtypes)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\ops\gen_io_ops.py", line 1546, in restore_v2

    shape_and_slices=shape_and_slices, dtypes=dtypes, name=name)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\framework\op_def_library.py", line 787, in _apply_op_helper

    op_def=op_def)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\framework\ops.py", line 3414, in create_op

    op_def=op_def)

  File "C:\Users\Invisible\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\framework\ops.py", line 1740, in __init__

    self._traceback = self._graph._extract_stack()  # pylint: disable=protected-access

NotFoundError (see above for traceback): Key regression/Variable not found in checkpoint

[[Node: save/RestoreV2 = RestoreV2[dtypes=[DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_save/Const_0_0, save/RestoreV2/tensor_names, save/RestoreV2/shape_and_s