code: def magick_command():
      if sys.platform == "win32":
          magickhome = os.environ.get("MAGICK_HOME", "")
          if magickhome:
              imagemagick = [os.path.join(magickhome, "convert.exe")]
              graphicsmagick = [
                  os.path.join(magickhome, "gm.exe"),
                  "convert",
              ]
          else:
              imagemagick = None
              graphicsmagick = None
      else:
          imagemagick = ["convert"]
          graphicsmagick = ["gm", "convert"]
  
      if imagemagick and shutil.which(imagemagick[0]):
          return imagemagick
      elif graphicsmagick and shutil.which(graphicsmagick[0]):
          return graphicsmagick
  
imports: import logging
  import os
  import shutil
  import sys
  import sysconfig
  import tempfile
  from io import BytesIO
  import pytest
  from packaging.version import parse
  from PIL import Image, ImageMath, features
label_desc: Use image node_id 20 for calling a global function with example usage: magick_command() and returns: imagemagick, graphicsmagick