Hello guys,
I have a problem with a list of modules. I have coded a module called BranchRoutingModule. I would like to create a list from this module.
I have the following code:
def _branch_routings(self):
    # structure = [nn.ModuleList([BranchRoutingModule(in_channels=self.in_channels) for j in range(int(pow(2, i)))]) for i in range(self.tree_height - 1)] # [[None], [None, None]] for tree height = 3
    structure = [[None for j in range(int(pow(2, i)))] for i in range(self.tree_height - 1)] # [[None], [None, None]] for tree height = 3

    cur = 0
    for i in range(self.tree_height - 1):
      for j in range(int(pow(2, i))):
        self.__setattr__('branch_routing_module' + str(cur), BranchRoutingModule(in_channels=self.in_channels))
        structure[i][j] = self.__getattr__('branch_routing_module' + str(cur))
        cur += 1
    return structure


I have first tried using nn.ModuleList (commented out at the top) but I get the following error: “Input type (torch.cuda.FloatTensor) and weight type (torch.FloatTensor) should be the same”
However if I use setattr and getattr, I get no errors and my model works fine.
Why is that? I don’t understand why setattr and getattr fix the problem.
I am using CUDA.
Thank you and regards,
Antoine