How to change activation layer in Pytorch pretrained module?

How to change the activation layer of a Pytorch pretrained network? Here is my code :

print("All modules")
for child in net.children():
    if isinstance(child,nn.ReLU) or isinstance(child,nn.SELU):
        print(child)

print('Before changing activation')
for child in net.children():
    if isinstance(child,nn.ReLU) or isinstance(child,nn.SELU):
        print(child)
        child=nn.SELU()
        print(child)
print('after changing activation')
for child in net.children():
    if isinstance(child,nn.ReLU) or isinstance(child,nn.SELU):
        print(child)

Here is my output:

All modules
ReLU(inplace=True)
Before changing activation
ReLU(inplace=True)
SELU()
after changing activation
ReLU(inplace=True)

Answer

._modules solves the problem for me.

for name,child in net.named_children():
    if isinstance(child,nn.ReLU) or isinstance(child,nn.SELU):
        net._modules['relu'] = nn.SELU()