Rasa installation error with Python 3.8 & python 3.7

Rasa Open Source
1

Rasa installation hangs trying to solve dependencies with python 3.8. Also when I use rasa 3.1.0 with python 3.9, I can’t use rasa-webchat as it requires sanic==21.6.0 as per issue here.

so in the end I can’t install rasa 3.0.0, as it’s only in the database for python 3.8 and not 3.9, and I can’t use web-chat with python 3.9 and rasa 3.1.0

2

Installing Rasa and managing its dependencies can sometimes be challenging due to the specific versions of the dependencies required.

Installing Rasa with Python 3.8

  1. Virtual Environment: Always use a virtual environment to avoid conflicts with system-wide packages. This also allows you to have different environments for different Python versions and sets of dependencies. For Python 3.8, you can create a virtual environment as follows:
python3.8 -m venv ./venv
source ./venv/bin/activate

Dependency Resolution: Dependency resolution can take a long time, especially with complex packages like Rasa. Sometimes, it’s just a matter of waiting. However, if it seems to hang indefinitely, you can try the following:

  • Upgrade pip to the latest version within the virtual environment:
pip install --upgrade pip

Install Rasa with the --use-deprecated=legacy-resolver option. This uses the older version of pip’s dependency resolver, which can sometimes resolve dependencies more efficiently for certain packages:

pip install --use-deprecated=legacy-resolver rasa
1 Like
3

Thank you @Ankit_Lathiya! It would be helpful for me.