fix style as pylint
fix style as pylint

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rflow,gunan/tensorflow,annarev/tensorflow,petewarden/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,aam-at/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,davidzchen/tensorflow,gautam1858/tensorflow,renyi533/tensorflow,frreiss/tensorflow-fred,frreiss/tensorflow-fred,petewarden/tensorflow,cxxgtxy/tensorflow,davidzchen/tensorflow,Intel-tensorflow/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,jhseu/tensorflow,xzturn/tensorflow,xzturn/tensorflow,petewarden/tensorflow,karllessard/tensorflow,jhseu/tensorflow,renyi533/tensorflow,renyi533/tensorflow,xzturn/tensorflow,annarev/tensorflow,jhseu/tensorflow,gautam1858/tensorflow,sarvex/tensorflow,davidzchen/tensorflow,petewarden/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,gautam1858/tensorflow,aldian/tensorflow,sarvex/tensorflow,gautam1858/tensorflow,gautam1858/tensorflow,xzturn/tensorflow,xzturn/tensorflow,jhseu/tensorflow,gunan/tensorflow,sarvex/tensorflow,cxxgtxy/tensorflow,aldian/tensorflow,renyi533/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer