samskalicky edited a comment on issue #19535:
URL:
https://github.com/apache/incubator-mxnet/issues/19535#issuecomment-727159044
Heres a silly example of a hierarchical Block/HybridBlock to play around
with:
```
class MyBlock(mx.gluon.nn.Block):
def __init__(self, **kwargs):
super(MyBlock, self).__init__(**kwargs)
def add(self, block):
self._children[block.name + str(len(self._children))] = block
def forward(self, x, *args):
out = (x,) + args
for block in self._children.values():
out = block(*out)
return out
# create the Model
inside = MyBlock()
inside.add(mx.gluon.nn.Dense(10))
net = MyBlock()
net.add(inside)
net.add(mx.gluon.nn.Dense(10))
net.initialize()
x = mx.nd.empty((1,10))
out = net(x)
#hybridize and create cached_graphs
net.hybridize()
out = net(x)
#save cached_graphs
save_cached_graphs(net)
```
The hierarchy should look like this, where a top level Block(0) has a child
Block(1) and a HybridBlock(1) and the child Block(1) has a child HybridBlock(0).
```
- MyBlock(0)
|
- MyBlock(1)
| |
| - Dense(0)
- Dense(1)
```
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