python—如何保存在for循环中创建的绘图？

cities = ['Austin', 'DFW', 'Houston', 'San Antonio']

for city in cities:
    city = employment_change.plot.barh(x='Industry', y=city, rot=0, legend=False, title=(f'Monthly Change of Employment by Industry in {city} From March to April'), color='#f8971f')
    city.set_xlabel('% Change of Employees Gained or Lost')
    city.axvline(x=0, linestyle='-', linewidth=2.5, color = '#17191a')
    plt.savefig(f'Monthly Change of Employment by Industry in {city} From March to April.png', dpi=300, bbox_inches='tight')