Vel factory function

def create(model, trust_region, entropy_coefficient, q_coefficient, max_grad_norm, discount_factor,
           rho_cap=10.0, retrace_rho_cap=1.0, average_model_alpha=0.99, trust_region_delta=1.0):
    """ Vel factory function """
    return AcerPolicyGradient(
        trust_region=trust_region,
        model_factory=model,
        entropy_coefficient=entropy_coefficient,
        q_coefficient=q_coefficient,
        rho_cap=rho_cap,
        retrace_rho_cap=retrace_rho_cap,
        max_grad_norm=max_grad_norm,
        discount_factor=discount_factor,
        average_model_alpha=average_model_alpha,
        trust_region_delta=trust_region_delta
    )