Sequential#
- class brainpy.Sequential(*modules_as_tuple, name=None, mode=None, **modules_as_dict)[source]#
A sequential input-output module.
Modules will be added to it in the order they are passed in the constructor. Alternatively, an
dict
of modules can be passed in. Theupdate()
method ofSequential
accepts any input and forwards it to the first module it contains. It then “chains” outputs to inputs sequentially for each subsequent module, finally returning the output of the last module.The value a
Sequential
provides over manually calling a sequence of modules is that it allows treating the whole container as a single module, such that performing a transformation on theSequential
applies to each of the modules it stores (which are each a registered submodule of theSequential
).What’s the difference between a
Sequential
and aContainer
? AContainer
is exactly what it sounds like–a container to storeDynamicalSystem
s! On the other hand, the layers in aSequential
are connected in a cascading way.Examples
>>> import brainpy as bp >>> import brainpy.math as bm >>> >>> # composing ANN models >>> l = bp.Sequential(bp.layers.Dense(100, 10), >>> bm.relu, >>> bp.layers.Dense(10, 2)) >>> l(bm.random.random((256, 100))) >>> >>> # Using Sequential with Dict. This is functionally the >>> # same as the above code >>> l = bp.Sequential(l1=bp.layers.Dense(100, 10), >>> l2=bm.relu, >>> l3=bp.layers.Dense(10, 2)) >>> l(bm.random.random((256, 100)))
- Parameters: