for name, child in model.named_children():
if isinstance(child, nn.Conv2d):
model._modules[name]=nn.Conv2d(3,3,3)
elif isinstance(child, nn.Sequential):
for sname, schild in child.named_children():
if isinstance(schild, nn.Conv2d):
print(name,sname)
model._modules[name]._modules[sname]=nn.Conv2d(3,3,3)