Streamlit app

[Daniel Juschus]

Hello,

I just cannot manage to package a simple Streamlit app (a library for creating browser-based GUIs). I have read through all the material on the Pyinstaller website and the Github wiki.

 

This is my main.py:

import streamlit as st

st.text("This program is running")

and this is my wrapper.py:

import subprocess
from pathlib import Path
import sys

def resource_path(relative_path):
try:
base_path = Path(sys._MEIPASS)
except AttributeError:
return relative_path
return base_path.joinpath(relative_path).as_posix()

main_script_path = resource_path("main.py")

with open('streamlit_output.txt', 'w') as f_out, open('streamlit_error.txt', 'w') as f_err:
subprocess.run(f'streamlit run "{main_script_path}"',
stdout=f_out, stderr=f_err, check=True, shell=True)

Running this wrapper locally works. 

To package it with Pyinstaller I first run pyi-makespec --onedir -w --additional-hooks-dir=hooks --add-data "main_st.py;." --hidden-import=streamlit --debug=all wrapper_st.py.

My hook-streamlit.py looks like this:

from PyInstaller.utils.hooks import copy_metadata, collect_submodules

datas = copy_metadata("streamlit")
hiddenimports = collect_submodules('streamlit')

I then modify the spec file datas section as follows (some people online said that this was necessary):

a = Analysis(
['wrapper_st.py'],
pathex=[],
binaries=[],
datas=[('main_st.py', '.'),
('C:/Users/jusc_da/venvs/airfucs-calc-311/Lib/site-packages/altair/vegalite/v5/schema', './altair/vegalite/v5/schema'),
('C:/Users/jusc_da/venvs/airfucs-calc-311/Lib/site-packages/streamlit/static', './streamlit/static')],

...

Finally I build the exe by running pyinstaller wrapper_st.spec --clean --noconfirm.

When double clicking the resulting exe, nothing happens. The streamlit_error.txt file contains:

'streamlit' is not recognized as an internal or external command,
operable program or batch file.

What am I doing wrong?

[bwoodsend]

Never try to run a Python command line entry point from a subprocess. Even without PyInstaller involved, there’s no guarantee that it’ll be findable. Lookup what the entry point does (in this case calling from streamlit.web.cli.main() and put that in your code instead.

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[Daniel Juschus]

Alright, thanks!

I have written a new wrapper_cli.py:

from streamlit.web.cli import main
import sys

sys.argv.append('run')
sys.argv.append('main_st.py')

main()

This works just fine locally. 

When I package it the same way, and then run it by double clicking, nothing happens. When I run it through the terminal as .\wrapper_cli.py, a browser window opens, strangely pointing to localhost:3000, with the browser showing "localhost refused to connect".

Any idea how I can start debugging this?

[bwoodsend]

sys.argv.append(‘main_st.py’)

Arhhh! See standard reply.

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