code: def cart2pol(x, y) -> tuple:
      """Transform Cartesian to polar coordinates"""
      return atan2(y, x), hypot(x, y)
  
file_path: pymap3d/src/pymap3d/utils.py
imports: from __future__ import annotations
  from math import pi
  from .ellipsoid import Ellipsoid
  from .mathfun import atan2, cos, hypot, radians, sin
label_desc: Use image node_id 1 for calling a global function with example usage: cart2pol(x, y) and returns: atan2,  hypot