class_docstr: Configuration class.
  
  This class is responsible for loading, saving, and storing PennyLane
  and plugin/device configurations.
  
  Args:
      name (str): filename of the configuration file.
          This should be a valid TOML file. You may also pass an absolute
          or a relative file path to the configuration file.
docstr: Return the path of the loaded configuration file.
  
  Returns:
      str: If no configuration is loaded, this returns ``None``.
docstr_tok: ["Return","the","path","of","the","loaded","configuration","file",".","Returns",":","str",":","If","no","configuration","is","loaded",",","this","returns","``","None","``","."]
code: def path(self):
      """Return the path of the loaded configuration file.
  
      Returns:
          str: If no configuration is loaded, this returns ``None``."""
      return self._filepath
  
file_path: pennylane/pennylane/configuration.py
imports: import contextlib
  import os
  import toml
  from appdirs import user_config_dir
label_desc: Use image node_id 4 for calling the Configuration obj's underlying member method code with example usage: obj.path() and returns: self