code: def qteSetAppletSignature(self, appletSignatures: (str, tuple, list)):
          
          # Convert the argument to a tuple if it is not already a tuple
          # or list.
          if not isinstance(appletSignatures, (tuple, list)):
              appletSignatures = appletSignatures,
  
          # Ensure that all arguments in the tuple/list are strings.
          for idx, val in enumerate(appletSignatures):
              if not isinstance(val, str):
                  args = ('appletSignatures', 'str', inspect.stack()[0][3])
                  raise QtmacsArgumentError(*args)
  
          # Store the compatible applet signatures as a tuple (of strings).
          self._qteAppletSignatures = tuple(appletSignatures)
docs: Specify the applet signatures with which this macro is compatible.
  
          Qtmacs uses this information at run time to determine if this
          macro is compatible with a particular applet, as specified by
          the applet's signature. Note that this function overwrites
          all previously set values.
  
          |Args|
  
          * ``*appletSignatures`` (**str, tuple, list**): applet signatures
            as a string, or tuple/list of strings.
  
          |Returns|
  
          * **None**
  
          |Raises|
  
          * **QtmacsArgumentError** if at least one argument has an invalid type.