No module named streamlit.__main__; 'streamlit' is a package and cannot be directly executed

Deployment
1

Hello guys,

When i try to deploy streamlit to heroku i get this below error.How can i fix it?

No module named streamlit.main; ‘streamlit’ is a package and cannot be directly executed

2
21748×612 185 KB
1
11701×769 173 KB

2

What versions of python are you running?

1 Like
3

Hey @M11, welcome to Streamlit!

The streamlit command lives in your virtualenv’s bin/ folder. It looks like pipenv run isn’t looking in that folder, and is instead finding the package called streamlit, and trying to execute that instead.

Without seeing any details of what your Heroku deployment looks like, it’s hard to offer concrete advice to fix this issue. But from your screenshots, it looks like you’re executing this command from within a pipenv shell. Since you’re already in the shell, you don’t need to use pipenv run streamlit run ... to run the streamlit command; having the shell activated means that the streamlit command will already be on your $PATH.

When you have the shell active, doing this should work instead:

streamlit run iris_eda_app.py

Alternately, you could forego pipenv and manage your virtualenv directly. I’ve put together a minimal working example of a Streamlit app that’s deployable to Heroku. It uses a plain requirements.txt file instead of a Pipfile: https://github.com/tconkling/streamlit_heroku_example

1 Like
4

Hi,
Had the same problem. I don’t know if it is windows related but on my ubuntu everything was fine.

Anyway, what you can do is to change the cli.py filename to __main__.py.
This worked for me

5

Hi @Noam, welcome to the Streamlit community!

You shouldn’t need to rename anything, plenty of people are able to deploy on Heroku without needing to modify the source files.

6

I’m having the same issue. I’m running 3.9 within a conda environment.

7

Hi @madras,

Welcome to the streamlit forum :slight_smile:. Are you running streamlit 0.72.0?

8

Hi @SimonBiggs, Thank you for responding.

I was running 0.71.0 earlier. I removed the environment and re-created it by this command:

conda create -p .\StreamLitEnv python=3.8

Switched to the above environment and then re-installed with this command:
conda install -c conda-forge streamlit

It seemed to work at this point and it installed 0.72 version. I also had SSL_VERIFY set to false. Even though it is bad practice, that’s the only way I could advance.

Out of curiosity, I tried this command:
pipenv install streamlit
This did not work. It failed with CERTIFICATE_VERIFY_FAILED errors.

My questions are:

  1. What is the command to update streamlit in future?
  2. How to get past the SSL errors? I’ve imported all the certificates from pypi.org etc etc, into the local Certificate store, copied the 2 DLLs into the DLL folder etc.
  3. Is streamlit ready to be used with Python 3.9 ? If so, how to update the version in the environment?

(I’m new to python, so I apologize for using incorrect terminology). Setting up the system to run streamlit took a lot of time and that is the most frustrating part. I enjoy coding with it.

Thank you for guidance.

9

Hi @Noam, can you share more information about your environment and how you installed it? Any of the below would be helpful.

  • Streamlit version: (get it with $ streamlit version)
  • Python version: (get it with $ python --version)
  • Using Conda? PipEnv? PyEnv? Pex?
  • OS version