def count_parameters(model, verbose=True):
    """Count number of parameters in PyTorch model,
    References: https://discuss.pytorch.org/t/how-do-i-check-the-number-of-parameters-of-a-model/4325/7.

    from utils.utils import count_parameters
    count_parameters(model)
    import sys
    sys.exit(1)
    """
    n_all = sum(p.numel() for p in model.parameters())
    n_trainable = sum(p.numel() for p in model.parameters() if p.requires_grad)
    if verbose:
        print("Parameter Count: all {:,d}; trainable {:,d}".format(n_all, n_trainable))
    return n_all, n_trainable