Matplotlib 动画不接受圆形补丁作为farg

Question

import mathimport matplotlibimport matplotlib.pyplot as pltimport matplotlib.patches as patchesfrom matplotlib.patches import Circlefrom matplotlib import animationfrom utils import rgb2hexfrom tg import small_tgmatplotlib.rcParams["figure.figsize"]=(10, 5)matplotlib.rcParams['toolbar'] = 'None'fig, ax = plt.subplots()ax.axis("equal")ax.set_xlim(-10, 10)ax.set_ylim(-5, 5)ax.axis("off")state_nodes = []for state in small_tg["states"]:    center = small_tg["states"][state]["graphic_properties"]["position"]    state_nodes.append(Circle(center, 0.2, color = rgb2hex(255, 255, 255)))def animate(i, state):    print("&", i ,state)    y = math.ceil((abs(i-100))*2.55)    print(i, y, (abs(i-100))*2.55)    state.set_color = rgb2hex(y,y,y)    ax.add_artist(state)    return state,for state in state_nodes:    print(state)    animation.FuncAnimation(fig, animate, fargs = (state,), frames=201, interval=1, blit=True, repeat = False)plt.show()for 循环内的打印语句显示状态，但是 animate 函数内的打印语句没有显示任何内容，这意味着该函数没有被调用。我找不到任何逻辑错误。请帮忙。