TroubleShooting:OSError: pydot failed to call GraphViz.Please install GraphViz......
最近在使用Keras搭建CNN時使用到一個函式plot_model(),這個函式需要使用SVG將網路結構以.png的格式儲存,但是在執行時出現錯誤提示:OSError: pydot
failed to call GraphViz.Please install GraphViz (https://www.graphviz.org/) and ensure that its executables are in the $PATH.
解決步驟:
(1)安裝graphviz-2.38.msi
GraphViz是.msi格式的,在下載的過程中有很多坑,在graphviz.org官網中download時各種報404,在百度搜索時大部分下載不了,最坑的是CSDN上的資源都需要積分,在此還是將我找到的百度雲盤的連結貼在這裡:
(2)新增環境變數
安裝好之後,需要在windows的系統變數中新增Path中。首先複製graphviz目錄下bin資料夾的地址,如:D:\Program Files (x86)\Graphviz2.38\bin,然後‘’我的電腦‘’->右鍵->屬性->高階系統設定->環境變數->編輯
(3)驗證
安裝完成後,在cmd中輸入dot -version檢視一下,是否安裝成功。然後再次執行Keras的model。
def HappyModel(input_shape): X_input = Input(input_shape) X = ZeroPadding2D((3, 3))(X_input) X = Conv2D(32, (7, 7), strides = (1, 1), name = 'conv0')(X) X = BatchNormalization(axis = 3, name = 'bn0')(X) X = Activation('relu')(X) X = MaxPooling2D((2, 2), name = 'max_pool')(X) X = Flatten()(X) X = Dense(1, activation = 'sigmoid', name = 'fc')(X) model = Model(inputs = X_input, outputs = X, name='HappyModel') return model happyModel = HappyModel(X_train.shape[1:]) happyModel.compile(optimizer = 'Adam', loss = 'binary_crossentropy', metrics = ["accuracy"]) happyModel.fit(x = X_train, y = Y_train, epochs = 10, batch_size = 32) happyModel.summary() print("done summary") plot_model(happyModel, to_file='HappyModel.png', show_shapes=True) SVG(model_to_dot(happyModel).create(prog='dot', format='svg'))
可見已經可以正常執行graphviz了。
Tips:如果在正確的進行前兩部的配置仍然報錯,那就非常有必要使出百試百靈的必殺技:重啟電腦!
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