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1.keras tensor计算的举例说明:

maxpool = MaxPool2D((2, 2))(input)

首先

MaxPool2D((2, 2))

def __call__(self, inputs, **kwargs)：# Layer class(object)的函数        """Wrapper around self.call(), for handling internal references.        If a Keras tensor is passed:            - We call self._add_inbound_node().            - If necessary, we `build` the layer to match                the _keras_shape of the input(s).            - We update the _keras_shape of every input tensor with                its new shape (obtained via self.compute_output_shape).                This is done as part of _add_inbound_node().            - We update the _keras_history of the output tensor(s)                with the current layer.                This is done as part of _add_inbound_node().        # Arguments            inputs: Can be a tensor or list/tuple of tensors.            **kwargs: Additional keyword arguments to be passed to `call()`.        # Returns            Output of the layer's `call` method.        # Raises            ValueError: in case the layer is missing shape information                for its `build` call.        """

python中的特殊函数call  ：  http://blog.csdn.net/autoliuweijie/article/details/50469007

概要

中，如果在创建class的时候写了call（）方法， 那么该class实例化出实例后， 实例名()就是调用call（）方法。

例子

class Animal(object):    __call__(self, words):        print "Hello: ", wordsif __name__ == "__main__":    cat = Animal()    cat("I am cat!")>>> Hello: I am cat!

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