code: def test_red():
      assert Color("black").red == 0
      assert Color("red").red == 1
      assert Color("white").red == 1
      assert 0.5 <= Color("rgba(128, 0, 0, 1)").red < 0.51
      c = Color("none")
      c.red = 1
      assert c.red == 1
  
imports: import ctypes
  import time
  import warnings
  from pytest import mark, raises
  from wand.color import Color
  from wand.compat import xrange
  from wand.version import QUANTUM_DEPTH, MAGICK_VERSION_INFO
label_desc: Use image node_id 7 for calling a global function with example usage: test_red() without return types