无法使用matplotlib.use（'Agg'），图形始终显示在屏幕上

原始问题的答案很简单。如果您不想在屏幕上显示图形，请不要使用。plt.show() 因此，您要做的只是：

import matplotlib.pylab as plt    
plt.plot(x,y) #whatever the x, y data be
#plt.show()  """Important: either comment this line or delete it"""
plt.savefig('path/where/you/want/to/save/filename.ext') 
#'filename' is either a new file or an already existing one which will get overwritten at the time of execution. 'ext' can be any valid image format including jpg, png, pdf, etc.