Create a tomodir subdirectory structure in the given directory

def create_tomodir(self, directory):
        """Create a tomodir subdirectory structure in the given directory
        """
        pwd = os.getcwd()
        if not os.path.isdir(directory):
            os.makedirs(directory)
        os.chdir(directory)

        directories = (
            'config',
            'exe',
            'grid',
            'mod',
            'mod/pot',
            'mod/sens',
            'rho',
        )
        for directory in directories:
            if not os.path.isdir(directory):
                os.makedirs(directory)

        os.chdir(pwd)