Standard install broken on debian stretch

[tback]

Default installation on debian stretch seems broken to me:

pip install kube-shell
kube-shell
Traceback (most recent call last):
  File "/home/tback/.local/bin/kube-shell", line 7, in <module>
    from kubeshell.main import cli
  File "/home/tback/.local/lib/python3.5/site-packages/kubeshell/main.py", line 6, in <module>
    from kubeshell.kubeshell import Kubeshell
  File "/home/tback/.local/lib/python3.5/site-packages/kubeshell/kubeshell.py", line 6, in <module>
    from prompt_toolkit.key_binding.defaults import load_key_bindings_for_prompt
ImportError: cannot import name 'load_key_bindings_for_prompt'