请参阅@ jmetz，@ suri，您将 validation_steps 参数设置为相同的问题，因为将其初始化为（X_test）/ 32 （可能不是标量）。
检查您的 validation_steps.shape / len（validation_steps）和您的 steps_per_epoch。形状 / len（steps_per_epoch）（取决于输入尺寸）。
它们必须是标量。

Referring to @jmetz, @suri you have the same issue with your validation_steps parameter, as you initialized it to (X_test)/32(probably not a scalar). Check your validation_steps.shape / len(validation_steps) and your steps_per_epoch.shape / len(steps_per_epoch)(depending on the input dimensions). They have to be scalars.