code: def main(args=None):
      try:
          import pyct.cmd
      except ImportError:
          import sys
          from . import _missing_cmd
  
          print(_missing_cmd())
          sys.exit(1)
      return pyct.cmd.substitute_main("datashader", args=args)
  
label_desc: Use image node_id 1 for calling a global function with example usage: main(args) and returns: pyct