code: def point_in_circle(pt, center, radius):
      '''
      Returns true if a given point is located inside (or on the border) of a circle.
      
      >>> point_in_circle((0, 0), (0, 0), 1)
      True
      >>> point_in_circle((1, 0), (0, 0), 1)
      True
      >>> point_in_circle((1, 1), (0, 0), 1)
      False
      '''
      d = np.linalg.norm(np.asarray(pt) - np.asarray(center))
      return d <= radiuf point_in_circle(pt, center, radius):
      '''
      Returns true if a given point is located inside (or on the border) of a circle.
      
      >>> point_in_circle((0, 0), (0, 0), 1)
      True
      >>> point_in_circle((1, 0), (0, 0), 1)
      True
      >>> point_in_circle((1, 1), (0, 0), 1)
      False
      '''
      d = np.linalg.norm(np.asarray(pt) - np.asarray(center))
      return d <= radius
docs: Returns true if a given point is located inside (or on the border) of a circle.
      
      >>> point_in_circle((0, 0), (0, 0), 1)
      True
      >>> point_in_circle((1, 0), (0, 0), 1)
      True
      >>> point_in_circle((1, 1), (0, 0), 1)
      False