code: def test_perspective_camera_field_of_view():
      cam = cameras.PerspectiveCamera(focal_length=28, sensor_width=36)
      assert cam.field_of_view == pytest.approx(1.1427, abs=1e-4)
  
imports: import pytest
  from kubric.core import cameras
label_desc: Use image node_id 3 for calling a global function with example usage: test_perspective_camera_field_of_view() without return types