code: def test_rsphere_biaxial():
      assert rsphere.biaxial() == approx(6367444.657)
  
file_path: pymap3d/src/pymap3d/tests/test_rsphere.py
imports: import pymap3d
  import pymap3d.rcurve
  import pymap3d.rsphere
  import pytest
  from pytest import approx
label_desc: Use image node_id 6 for calling a global function with example usage: test_rsphere_biaxial() without return types