Is there a path to convert a 2d graphic drawn by matplotlib to a 3d graphic drawn by matplotlib

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For example, I use
axes, subplot=colour.plotting.plot_ chromaticity_ diagram_ CIE1931(standalone=False)

A 2d axis is returned, but I want to use this axis as the face of the 3d graph z=0. Is there any way for me to do this in matplotlib? Thank you