def _setup(self):
        """
         Prepare the scenario for Molecule and returns None.

         :return: None
         """
        if not os.path.isdir(self.inventory_directory):
            os.makedirs(self.inventory_directory)
def _setup ( self ) : if not os . path . isdir ( self . inventory_directory ) : os . makedirs ( self . inventory_directory )
Prepare the scenario for Molecule and returns None.

         :return: None