code: def copyright(ctx):
      """list usage of copyright notices
  
      The use of copyright notices should be limited to files that are likely
      to be used in other projects, or to make appropriate attributions for code
      taken from other projects. Other than that, git geeps track of what person
      wrote what.
      """
  
      # Processing the whole root directory
      for dirpath, dirnames, filenames in os.walk(ROOT_DIR):
          # Check if we should skip this directory
          reldirpath = os.path.relpath(dirpath, ROOT_DIR)
          if reldirpath[0] in "._" or reldirpath.endswith(
              "__pycache__"
          ):
              continue
          if os.path.split(reldirpath)[0] in ("build", "dist"):
              continue
          # Process files
          for fname in filenames:
              if not fname.endswith(".py"):
                  continue
              # Open and check
              filename = os.path.join(dirpath, fname)
              text = open(filename, "rt", encoding="utf-8").read()
              if "copyright" in text[:200].lower():
                  print(
                      "Copyright in %s%s%s"
                      % (reldirpath, os.path.sep, fname)
                  )
                  for i, line in enumerate(text[:200].splitlines()):
                      if "copyright" in line.lower():
                          print("  line %i: %s" % (i + 1, line))
  
label_desc: Use image node_id 1 for calling a global function with example usage: copyright(ctx) without return types