code: def test_rcurve_meridian(lat, curvature):
      assert rcurve.meridian(lat) == approx(curvature)
  
file_path: pymap3d/src/pymap3d/tests/test_rcurve.py
imports: import pymap3d
  import pymap3d.rcurve
  import pytest
  from pytest import approx
label_desc: Use image node_id 3 for calling a global function with example usage: test_rcurve_meridian(lat, curvature) without return types