why spines doesn't work with plot() but works with subplot() in matplotlib?

Question

When I use plot() function to draw plot in matplotlib.

plot().spines doesn't show me the spines

but subplot().spines gives output

Why don't they return same output?

Answer 1

No they don't return the same output. In fact, pyplot.plot is a plotting function which returns a sequence of Line2D objects, while pyplot.subplot is a gridding function which returns a matplotlib.axes._subplots.AxesSubplot object.

While the AxesSubplot has spines (as one can imaginge from the image), the Line2D does not have any spines (it's a simple line, what would spines be for it?).