出错的程序源代码: 看到这个源代码,大家应该疑惑了吧,这是对的啊!!!! 但是报错了: D:\PycharmProjects\python_project\venv\Scripts\python.exe D:/PycharmProjects/python_project/matplotlib/04绘制一元二次方程曲线.py Traceback (most recent call last): File “D:/PycharmProjects/python_project/matplotlib/04绘制一元二次方程曲线.py”, line 11, in plt.savefig(‘