How to explicit import from submodule of a builtin

Question

Working with Python for Foundry Modo 3D application, and their Python SDK lx is a builtin module.

>>> type(lx)
"<class 'module'>"

symbol is a module in lx, which contains constants.

What I'm trying to do is run

from lx.symbol import sCATEGORY_TOOL

But this raises ModuleNotFoundError: No module named 'lx.symbol'; lx is not a package

It is all mostly to avoid having to type lx.symbol.i_VERY_LONG_CONSTANT_NAME

=== Edit ===

Ok, so it could be solved by doing

import lx
foo = lx.symbol.foo
bar = lx.symbol.bar
baz = lx.symbol.baz
...

But I think it seem much more clear if it would come as

from lx.symbol import foo,\
  bar,\
  baz,\
  ...