用python写出粒子群算法伪码

以下是使用Python编写粒子群算法的伪码：

function PSO():
    Initialize particles with random positions and velocities
    Initialize global best position and fitness

    while stopping criterion is not met:
        for each particle:
            Update particle's velocity using equation (1)
            Update particle's position using equation (2)
            Update particle's fitness

            if particle's fitness is better than global best fitness:
                Update global best position and fitness

    return global best position and fitness

equation (1): new_velocity = w * old_velocity + c1 * rand() * (particle_best_position - current_position) + c2 * rand() * (global_best_position - current_position)
equation (2): new_position = current_position + new_velocity