code: def find_mod(module_name):
      """
      Find module `module_name` on sys.path, and return the path to module `module_name`.
  
      * If `module_name` refers to a module directory, then return path to `__init__` file.
          * If `module_name` is a directory without an __init__file, return None.
  
      * If module is missing or does not have a `.py` or `.pyw` extension, return None.
          * Note that we are not interested in running bytecode.
  
      * Otherwise, return the fill path of the module.
  
      Parameters
      ----------
      module_name : str
  
      Returns
      -------
      module_path : str
          Path to module `module_name`, its __init__.py, or None,
          depending on above conditions.
      """
      spec = importlib.util.find_spec(module_name)
      module_path = spec.origin
      if module_path is None:
          if spec.loader in sys.meta_path:
              return spec.loader
          return None
      else:
          split_path = module_path.split(".")
          if split_path[-1] in ["py", "pyw"]:
              return module_path
          else:
              return None
  
label_desc: Use image node_id 1 for calling a global function with example usage: find_mod(module_name) and returns: None, spec, module_path, None