求python大佬帮帮忙

可以改为如下：

import numpy as np
import matplotlib.pyplot as plt
import matplotlib
matplotlib.rcParams['font.family']='simHei'
plt.rcParams ['axes.unicode_minus']= False
def DrawLine(output_name):
    x = np.arange(0, 2 * np.pi, 0.1)
    y1 = np.sin(x)
    y2 = np.sin(x * 2)
    plt.figure('fig1')

    plt.plot(x,y1)
    plt.plot(x,y2)
    plt.savefig(output_name,dpi=300)
    plt.show()

DrawLine('output_name.jpg')

显示效果如下：