[SOLVED] python Keras # About Keras layers

# About Keras layers

All Keras layers have a number of methods in common:

`layer.get_weights()`: returns the weights of the layer as a list of Numpy arrays.
`layer.set_weights(weights)`: sets the weights of the layer from a list of Numpy arrays (with the same shapes as the output of `get_weights`).
`layer.get_config()`: returns a dictionary containing the configuration of the layer. The layer can be reinstantiated from its config via:

`python
layer = Dense(32)
config = layer.get_config()
reconstructed_layer = Dense.from_config(config)
`

Or:

`python
from keras import layers

config = layer.get_config()
layer = layers.deserialize({class_name: layer.__class__.__name__,
config: config})
`

If a layer has a single node (i.e. if it isnt a shared layer), you can get its input tensor, output tensor, input shape and output shape via:

`layer.input`
`layer.output`
`layer.input_shape`
`layer.output_shape`

If the layer has multiple nodes (see: [the concept of layer node and shared layers](/getting-started/functional-api-guide/#the-concept-of-layer-node)), you can use the following methods:

`layer.get_input_at(node_index)`
`layer.get_output_at(node_index)`
`layer.get_input_shape_at(node_index)`
`layer.get_output_shape_at(node_index)`