Error importing hydralit: "ModuleNotFoundError: No module named 'streamlit.report_thread'"

I installed Hydralit, but when I try to import I get the following error: "ModuleNotFoundError: No module named 'streamlit.report_thread'". Interestingly I can import and use hydralit_components.

Versions used:

hydralit >=1.0.9 hydralit_components >=1.0.4 streamlit >=0.89 python ==3.8.10 

Error in full:

Python 3.8.10 (default, Nov 26 2021, 20:14:08) [GCC 9.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import hydralit Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/lorena/.local/lib/python3.8/site-packages/hydralit/__init__.py", line 1, in <module> from hydralit.hydra_app import HydraApp File "/home/lorena/.local/lib/python3.8/site-packages/hydralit/hydra_app.py", line 5, in <module> from hydralit.sessionstate import SessionState File "/home/lorena/.local/lib/python3.8/site-packages/hydralit/sessionstate.py", line 1, in <module> import streamlit.report_thread as ReportThread ModuleNotFoundError: No module named 'streamlit.report_thread' 

3 Answers

I was able to make my problem go away by replacing

from streamlit.report_thread import add_report_ctx 

with

from streamlit.script_run_context import add_script_run_ctx 

(And, of course, replacing uses of add_report_ctx with add_script_run_ctx.)

I saw, however, on the streamlit discussion page, a question and answer on this problem, and they said this problem was introduced with 1.4 and to rollback to 1.3. So I am not sure what other problems may occur with my workaround. But I was able to make the import error disappear and a very quick test showed that it works.

The solution is to update to Hydralit version 1.0.12, as the issue with Streamlit 1.40 was fixed with the last release. pip install -U hydralit should take care of this issue.

In addition to what the user @Phil commented this change worked for me doing it the next way:

I changed the code of the package of hydralit in the sessionstate.py script.

If you are using a virtualenv, go to your-virtualenv-name/lib/pythonx.y/site-packages/hydralit/sessionstate.py.

If you are not using a virtual environment, find where is your package is installed and do the change there.

In the top part of the sessionstate.py file we change:

import streamlit st_ver = int(streamlit.__version__.replace('.','')) if st_ver < 140: import streamlit.report_thread as ReportThread from streamlit.server.server import Server else: from streamlit.script_run_context import get_script_run_ctx # Line to change 

With:

import streamlit st_ver = int(streamlit.__version__.replace('.','')) if st_ver < 140: import streamlit.report_thread as ReportThread from streamlit.server.server import Server else: from streamlit.scriptrunner import get_script_run_ctx # Changed line 

This solved my problems with the import of hydralit.

Versions of packages:

streamlit=1.9.0
HydraLit=1.0.12

Hope this helps others.