class_docstr: Projection base class
class_docstr_tok: ["Projection","base","class"]
docstr: Project x and y
docstr_tok: ["Project","x","and","y"]
code: def __call__(self, xy):
      """Project x and y"""
      x, y = xy
      return (self.x(x), self.y(y))
  
imports: from __future__ import division
  from math import cos, log10, pi, sin
label_desc: Use image node_id 4 for calling the View obj's underlying member method code with example usage: obj.__call__(xy) and returns: self,  self