code: def inside_circle(cx, cy, r):
      """
      Return a function that checks whether a point is in a circle with center
      (*cx*, *cy*) and radius *r*.
  
      The returned function has the signature::
  
          f(xy: tuple[float, float]) -> bool
      """
      r2 = r**2
  
      def _f(xy):
          x, y = xy
          return (x - cx) ** 2 + (y - cy) ** 2 < r2
  
      return _f
  
imports: from functools import lru_cache
  import math
  import warnings
  import numpy
  from matplotlib import _api
label_desc: Use image node_id 9 for calling a global function with example usage: inside_circle(cx, cy, r) and returns: _f, unknown