"""
Aliases created in this module are useless for static type checking, instead,
they act as hints for human only
"""
from typing import (
    Any,
)

# Tensor with shape (None, 4, 84, 84)
BatchState = Any
# Tensor with shape (None, 1)
BatchAction = Any
# Tensor with shape (None, 1)
BatchReward = Any
# Tensor with shape (None, 4, 84, 84)
BatchNext = Any
# Tensor with shape (None, 1)
BatchDone = Any
# NDArray with shape (210, 160, 3)
GymImg = Any
# NDArray with shape (84, 84, 1)
GymObs = Any
# Tensor with shape (N, 1)
TensorN1 = Any
# Tensor with shape (1, 84, 84)
TensorObs = Any
# A stack with 4 GymObs, with shape (1, 4, 84, 84)
TensorStack4 = Any
# A stack with 5 GymObs, with shape (1, 5, 84, 84)
TensorStack5 = Any
# torch.device("cpu") or torch.device("cuda"), can be conditional on
# torch.cuda.is_available()
TorchDevice = Any