Access nested dependency `A.B` without triggering `A.__init__()`

General Usage
1

Example: I have expressed a dependency on PyPlot, and I want to access PyCall (which is a dependency of PyPlot. I can do import PyPlot; PyPlot.PyCall, but that triggers PyPlot.__init__(). Is there a way to access PyCall without importing PyPlot, other than adding PyCall as a direct dependency?