我想做这样的事情：
import matplotlib.pyplot as plt
%matplotlib inline
fig1 = plt.figure(1)
plt.plot([1,2,3],[5,2,4])
plt.show()
在一个单元格中，然后在另一个单元格中重绘完全相同的图，如下所示：
plt.figure(1) # attempting to reference the figure I created earlier...
# four things I've tried:
plt.show() # does nothing... :(
fig1.show() # throws warning about backend and does nothing
fig1.draw() # throws error about renderer
fig1.plot([1,2,3],[5,2,4]) # This also doesn't work (jupyter outputs some
# text saying matplotlib.figure.Figure at 0x..., changing the backend and
# using plot don't help with that either), but regardless in reality
# …