解决tensorflow由于未初始化变量而导致的错误问题_Python

我写的这个程序

									import tensorflow as tf

									sess=tf.InteractiveSession()

									x=tf.Variable([1.0,2.0])

									a=tf.constant([3.0,3.0])

									x.initializer.run()

									sun=tf.div(x,a)

									print(sub.eval())

									sess.close()

出现了如下所示的错误：

原因是倒数第二行的sub没有初始化，倒数第三行应该是初始化sub的，但是打错了，成了sun,这样后面出现的sub就相当于没有初始化，所以出现了变量没有初始化的错误。

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

									FailedPreconditionError          Traceback (most recent call last)

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.py in _do_call(self, fn, *args)

									  1360   try:

									-> 1361    return fn(*args)

									  1362   except errors.OpError as e:

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.py in _run_fn(session, feed_dict, fetch_list, target_list, options, run_metadata)

									  1339      return tf_session.TF_Run(session, options, feed_dict, fetch_list,

									-> 1340                  target_list, status, run_metadata)

									  1341

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\errors_impl.py in __exit__(self, type_arg, value_arg, traceback_arg)

									  515       compat.as_text(c_api.TF_Message(self.status.status)),

									--> 516       c_api.TF_GetCode(self.status.status))

									  517   # Delete the underlying status object from memory otherwise it stays alive

									FailedPreconditionError: Attempting to use uninitialized value Variable_1

									     [[Node: Variable_1/read = Identity[T=DT_FLOAT, _class=["loc:@Variable_1"], _device="/job:localhost/replica:0/task:0/device:CPU:0"](Variable_1)]]

									During handling of the above exception, another exception occurred:

									FailedPreconditionError          Traceback (most recent call last)

									<ipython-input-3-cac34f40642f> in <module>()

									   5 x.initializer.run()

									   6 sun=tf.div(x,a)

									----> 7 print(sub.eval())

									   8 sess.close()

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py in eval(self, feed_dict, session)

									  654

									  655   """

									--> 656   return _eval_using_default_session(self, feed_dict, self.graph, session)

									  657

									  658

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py in _eval_using_default_session(tensors, feed_dict, graph, session)

									  4899            "the tensor's graph is different from the session's "

									  4900            "graph.")

									-> 4901  return session.run(tensors, feed_dict)

									  4902

									  4903

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.py in run(self, fetches, feed_dict, options, run_metadata)

									  903   try:

									  904    result = self._run(None, fetches, feed_dict, options_ptr,

									--> 905             run_metadata_ptr)

									  906    if run_metadata:

									  907     proto_data = tf_session.TF_GetBuffer(run_metadata_ptr)

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.py in _run(self, handle, fetches, feed_dict, options, run_metadata)

									  1135   if final_fetches or final_targets or (handle and feed_dict_tensor):

									  1136    results = self._do_run(handle, final_targets, final_fetches,

									-> 1137               feed_dict_tensor, options, run_metadata)

									  1138   else:

									  1139    results = []

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.py in _do_run(self, handle, target_list, fetch_list, feed_dict, options, run_metadata)

									  1353   if handle is None:

									  1354    return self._do_call(_run_fn, self._session, feeds, fetches, targets,

									-> 1355              options, run_metadata)

									  1356   else:

									  1357    return self._do_call(_prun_fn, self._session, handle, feeds, fetches)

									C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.py in _do_call(self, fn, *args)

									  1372     except KeyError:

									  1373      pass

									-> 1374    raise type(e)(node_def, op, message)

									  1375

									  1376  def _extend_graph(self):

									FailedPreconditionError: Attempting to use uninitialized value Variable_1

									     [[Node: Variable_1/read = Identity[T=DT_FLOAT, _class=["loc:@Variable_1"], _device="/job:localhost/replica:0/task:0/device:CPU:0"](Variable_1)]]

									Caused by op 'Variable_1/read', defined at:

									 File "C:\Users\SKJ\Anaconda3\lib\runpy.py", line 184, in _run_module_as_main

									  "__main__", mod_spec)

									 File "C:\Users\SKJ\Anaconda3\lib\runpy.py", line 85, in _run_code

									  exec(code, run_globals)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\__main__.py", line 3, in <module>

									  app.launch_new_instance()

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\traitlets\config\application.py", line 653, in launch_instance

									  app.start()

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelapp.py", line 474, in start

									  ioloop.IOLoop.instance().start()

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\ioloop.py", line 162, in start

									  super(ZMQIOLoop, self).start()

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tornado\ioloop.py", line 887, in start

									  handler_func(fd_obj, events)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tornado\stack_context.py", line 275, in null_wrapper

									  return fn(*args, **kwargs)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 440, in _handle_events

									  self._handle_recv()

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 472, in _handle_recv

									  self._run_callback(callback, msg)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 414, in _run_callback

									  callback(*args, **kwargs)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tornado\stack_context.py", line 275, in null_wrapper

									  return fn(*args, **kwargs)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 276, in dispatcher

									  return self.dispatch_shell(stream, msg)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 228, in dispatch_shell

									  handler(stream, idents, msg)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 390, in execute_request

									  user_expressions, allow_stdin)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\ipkernel.py", line 196, in do_execute

									  res = shell.run_cell(code, store_history=store_history, silent=silent)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\zmqshell.py", line 501, in run_cell

									  return super(ZMQInteractiveShell, self).run_cell(*args, **kwargs)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2717, in run_cell

									  interactivity=interactivity, compiler=compiler, result=result)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2821, in run_ast_nodes

									  if self.run_code(code, result):

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2881, in run_code

									  exec(code_obj, self.user_global_ns, self.user_ns)

									 File "<ipython-input-2-69a776ba1e33>", line 3, in <module>

									  x=tf.Variable([1.0,2.0])

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\variables.py", line 233, in __init__

									  constraint=constraint)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\variables.py", line 381, in _init_from_args

									  self._snapshot = array_ops.identity(self._variable, name="read")

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\array_ops.py", line 131, in identity

									  return gen_array_ops.identity(input, name=name)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\gen_array_ops.py", line 2656, in identity

									  "Identity", input=input, name=name)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\op_def_library.py", line 787, in _apply_op_helper

									  op_def=op_def)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py", line 3271, in create_op

									  op_def=op_def)

									 File "C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py", line 1650, in __init__

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

									FailedPreconditionError (see above for traceback): Attempting to use uninitialized value Variable_1

									     [[Node: Variable_1/read = Identity[T=DT_FLOAT, _class=["loc:@Variable_1"], _device="/job:localhost/replica:0/task:0/device:CPU:0"](Variable_1)]]