Latest haystack requires python 3.8 upwards?

[predoctech]

Typically I followed the installation recommendation and install haystack by:

git clone https://github.com/deepset-ai/haystack.git
cd haystack
pip install --editable .

This works until maybe a couple of days ago when there are changes to the dependency of 'Literal" from 'typing_extensions'. From internet search it seems like that is only supported from python v3.8 upwards. The first hit on that in my case is in /content/haystack/haystack/retriever/elasticsearch.py

I am developing my Haystack code in Google Colab and its python base is still v3.6.9. So the code failed at the early import library stage. What is the best way to get around such python dependencies?

[tanaysoni]

Hi @predoctech, thank you for raising the issue. The Literal type hint is removed by #156, so it should now work in Colab notebook.