ModuleNotFoundError: No module named 'sqlalchemy'

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1

Hi!

My app need to source data from postgresql, however when I launched the app, I got the following errors:

Traceback (most recent call last):
  File "/home/adminuser/venv/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 541, in _run_script
    exec(code, module.__dict__)
  File "/mount/src/aisreport/interface.py", line 4, in <module>
    conn = st.experimental_connection("postgresql", type="sql")
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adminuser/venv/lib/python3.11/site-packages/streamlit/runtime/connection_factory.py", line 298, in connection_factory
    raise ModuleNotFoundError(f"{str(e)}. {extra_info}")
ModuleNotFoundError: No module named 'sqlalchemy'. You need to install the 'sqlalchemy' package to use this connection.

Although in my requirements.txt file, I already included the sqlalchemy. These are my links:

2

Hi @linhphan09, welcome to our forums! :raised_hands:

A couple of questions:

  • Is the app working locally with this setup?
  • Have you tried specifying a different version for sqlalchemy (e.g., sqlalchemy==2.0.22)?

Best wishes,
Charly

3

Hi @Charly_Wargnier ! Thank you for your response.
For the questions:

  • I’m quite new with streamlit. Could you elaborate more on how I can setup the app so it work locally?

  • I have tried another version for sqlalchemy, but the same error still persists.

Cheers!

4

Absolutely @linhphan09!

Here’s a step-by-step guide for using Streamlit on your local machine.

1. Setup a Virtual Environment:

python -m venv streamlit_env
source streamlit_env/bin/activate

2. Install Streamlit:

pip install streamlit

3. Write Your App (app.py):

import streamlit as st
st.title('My First Streamlit App')
name = st.text_input('Enter your name:')
st.write(f'Hello, {name}!')

4. Run the App:

streamlit run app.py

To view, open http://localhost:8501 in a browser.

5. Stop the App:

Press Ctrl+C in the terminal.

Let me know if the app is indeed working locally. If not, we can investigate further.

Best,
Charly

5

Hi @Charly_Wargnier
In my local app, it works well if it’s the exact same prompt (without connecting to postgresql). Once I use the previous code that I used in my repository, it encountered another error of not finding the secrets file path.

Thanks!

6

Did you add your secrets in the Streamlit Community Cloud settings pane?

If not, here’s how to do it:

Charly

7

By the way, as a best practice, you should keep your secret info out of your GitHub repository. Be sure to add your secrets.toml file to your .gitignore so you don’t accidentally commit them. :slight_smile:

Best,
Charly

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