client wrapper for kernels_initialize, takes same arguments but
            sets default folder to be None. If None, defaults to present
            working directory.
             Parameters
            ==========
            folder: the path of the folder (None defaults to ${PWD})

def kernels_initialize_cli(self, folder=None):
        """ client wrapper for kernels_initialize, takes same arguments but
            sets default folder to be None. If None, defaults to present
            working directory.
             Parameters
            ==========
            folder: the path of the folder (None defaults to ${PWD})
        """
        folder = folder or os.getcwd()
        meta_file = self.kernels_initialize(folder)
        print('Kernel metadata template written to: ' + meta_file)