解决tensorflow由于未初始化变量而导致的错误问题
我写的这个程序
importtensorflowastf 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。
FailedPreconditionErrorTraceback(mostrecentcalllast) C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.pyin_do_call(self,fn,*args) 1360try: ->1361returnfn(*args) 1362excepterrors.OpErrorase: C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.pyin_run_fn(session,feed_dict,fetch_list,target_list,options,run_metadata) 1339returntf_session.TF_Run(session,options,feed_dict,fetch_list, ->1340target_list,status,run_metadata) 1341 C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\errors_impl.pyin__exit__(self,type_arg,value_arg,traceback_arg) 515compat.as_text(c_api.TF_Message(self.status.status)), -->516c_api.TF_GetCode(self.status.status)) 517#Deletetheunderlyingstatusobjectfrommemoryotherwiseitstaysalive FailedPreconditionError:AttemptingtouseuninitializedvalueVariable_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)]] Duringhandlingoftheaboveexception,anotherexceptionoccurred: FailedPreconditionErrorTraceback(mostrecentcalllast)in () 5x.initializer.run() 6sun=tf.div(x,a) ---->7print(sub.eval()) 8sess.close() C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.pyineval(self,feed_dict,session) 654 655""" -->656return_eval_using_default_session(self,feed_dict,self.graph,session) 657 658 C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.pyin_eval_using_default_session(tensors,feed_dict,graph,session) 4899"thetensor'sgraphisdifferentfromthesession's" 4900"graph.") ->4901returnsession.run(tensors,feed_dict) 4902 4903 C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.pyinrun(self,fetches,feed_dict,options,run_metadata) 903try: 904result=self._run(None,fetches,feed_dict,options_ptr, -->905run_metadata_ptr) 906ifrun_metadata: 907proto_data=tf_session.TF_GetBuffer(run_metadata_ptr) C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.pyin_run(self,handle,fetches,feed_dict,options,run_metadata) 1135iffinal_fetchesorfinal_targetsor(handleandfeed_dict_tensor): 1136results=self._do_run(handle,final_targets,final_fetches, ->1137feed_dict_tensor,options,run_metadata) 1138else: 1139results=[] C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.pyin_do_run(self,handle,target_list,fetch_list,feed_dict,options,run_metadata) 1353ifhandleisNone: 1354returnself._do_call(_run_fn,self._session,feeds,fetches,targets, ->1355options,run_metadata) 1356else: 1357returnself._do_call(_prun_fn,self._session,handle,feeds,fetches) C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\client\session.pyin_do_call(self,fn,*args) 1372exceptKeyError: 1373pass ->1374raisetype(e)(node_def,op,message) 1375 1376def_extend_graph(self): FailedPreconditionError:AttemptingtouseuninitializedvalueVariable_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)]] Causedbyop'Variable_1/read',definedat: File"C:\Users\SKJ\Anaconda3\lib\runpy.py",line184,in_run_module_as_main "__main__",mod_spec) File"C:\Users\SKJ\Anaconda3\lib\runpy.py",line85,in_run_code exec(code,run_globals) File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\__main__.py",line3,in app.launch_new_instance() File"C:\Users\SKJ\Anaconda3\lib\site-packages\traitlets\config\application.py",line653,inlaunch_instance app.start() File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelapp.py",line474,instart ioloop.IOLoop.instance().start() File"C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\ioloop.py",line162,instart super(ZMQIOLoop,self).start() File"C:\Users\SKJ\Anaconda3\lib\site-packages\tornado\ioloop.py",line887,instart handler_func(fd_obj,events) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tornado\stack_context.py",line275,innull_wrapper returnfn(*args,**kwargs) File"C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py",line440,in_handle_events self._handle_recv() File"C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py",line472,in_handle_recv self._run_callback(callback,msg) File"C:\Users\SKJ\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py",line414,in_run_callback callback(*args,**kwargs) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tornado\stack_context.py",line275,innull_wrapper returnfn(*args,**kwargs) File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelbase.py",line276,indispatcher returnself.dispatch_shell(stream,msg) File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelbase.py",line228,indispatch_shell handler(stream,idents,msg) File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\kernelbase.py",line390,inexecute_request user_expressions,allow_stdin) File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\ipkernel.py",line196,indo_execute res=shell.run_cell(code,store_history=store_history,silent=silent) File"C:\Users\SKJ\Anaconda3\lib\site-packages\ipykernel\zmqshell.py",line501,inrun_cell returnsuper(ZMQInteractiveShell,self).run_cell(*args,**kwargs) File"C:\Users\SKJ\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py",line2717,inrun_cell interactivity=interactivity,compiler=compiler,result=result) File"C:\Users\SKJ\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py",line2821,inrun_ast_nodes ifself.run_code(code,result): File"C:\Users\SKJ\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py",line2881,inrun_code exec(code_obj,self.user_global_ns,self.user_ns) File" ",line3,in x=tf.Variable([1.0,2.0]) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\variables.py",line233,in__init__ constraint=constraint) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\variables.py",line381,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",line131,inidentity returngen_array_ops.identity(input,name=name) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\ops\gen_array_ops.py",line2656,inidentity "Identity",input=input,name=name) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\op_def_library.py",line787,in_apply_op_helper op_def=op_def) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py",line3271,increate_op op_def=op_def) File"C:\Users\SKJ\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py",line1650,in__init__ self._traceback=self._graph._extract_stack()#pylint:disable=protected-access FailedPreconditionError(seeabovefortraceback):AttemptingtouseuninitializedvalueVariable_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)]]
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