Use IPython REPL in VS Code

Adding the following setting (Preference: Open Settings JSON; or Preference -> Settings -> Search launchArgs -> edit in json) works without any extension. It also fixes the issue that multiple lines cannot be sent to Python.

"python.terminal.launchArgs": [
    "-c",
    "\"import subprocess; subprocess.call(['ipython', '--no-autoindent'])\""
],

Update (2020-12-27): the following setting seems to work better because it supports Ctrl+C keyboard interrupt without existing IPython:

"python.terminal.launchArgs": [
    "-m",
    "IPython",
    "--no-autoindent",
],