draw(data1,data2,fig):
fig = plt.gcf() #get current figure
plt.clf() #清除figure上之前画的图
plt.plot(data1,linewidth='5')
plt.plot(data2,'r')
fig.savefig("abc.png", dpi=200,bbox_inches = 'tight')
#plt.show()
if __name__ == "__main__":
...
fig = plt.figure(figsize=(16, 9))
draw(data1,data2,fig)