ImportError: cannot import name 'CompositionView' from 'sanic.views' when I tried to install Rasa3 in python version 3.8

Question

I am facing below issue when I tried to install Rasa3 in python version 3.8

Traceback (most recent call last):
  File "/home/mayurpardeshi/test/bin/rasa", line 5, in <module>
    from rasa.__main__ import main
  File "/home/mayurpardeshi/test/lib/python3.8/site-packages/rasa/__main__.py", line 14, in <module>
    from rasa.cli import (
  File "/home/mayurpardeshi/test/lib/python3.8/site-packages/rasa/cli/export.py", line 9, in <module>
    import rasa.core.utils
  File "/home/mayurpardeshi/test/lib/python3.8/site-packages/rasa/core/utils.py", line 25, in <module>
    from sanic.views import CompositionView
ImportError: cannot import name 'CompositionView' from 'sanic.views' (/home/mayurpardeshi/test/lib/python3.8/site-packages/sanic/views.py)

Do anyone has solved this issue?

Answer 1

This is an issue caused by a recent Sanic upgrade. It's described in more detail in this GitHub issue.

The short-term solution is to manually install the old version of Sanic. This should suffice:

pip install sanic==21.9.3