The dqn_agent.py loss function is the wrong way around

[i1Cps]

In dqn_agent.py, shouldnt the loss function be:

loss = self.q_eval.loss(q_pred, q_target).to(self.q_eval.device)

Instead of:

loss = self.q_eval.loss(q_target, q_pred).to(self.q_eval.device)

Pytorch documentation for reference

[i1Cps]

"The magnitude of the loss is always the same regardless of the order." "The gradients of the loss function, with respect to the weights of the network, for a constant (i.e. the target) is always zero."