jupyterlab/scripts/create_theme.py

# coding: utf-8
"""JupyterLab command handler"""

# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.

import pexpect

child = pexpect.spawn("node buildutils/lib/create-theme.js")
child.expect("name:")
child.sendline("foo")
child.expect("title:")
child.sendline("Foo")
child.expect("description:")
child.sendline("foo theme")
child.expect("Created new theme")