admin管理员组

文章数量:1435842

I have a Python project in Ubuntu 24.04.1 LTS and I have a DevContainer in VSC with Debian GNU/Linux 11, the problem is that Pylance is flagging import streamlit as st with Import "streamlit" could not be resolved. If I run the application from the terminal with streamlit run myfile.py, it runs perfectly, but launching the debugger raises this exception:

EDIT I reset the Docker image, and the exception changed to a simpler one:

/usr/bin/python3: No module named streamlit

This is my devcontainer.json:

{
    "build": {"dockerfile": "Dockerfile"},
    "customizations": {
        "vscode": {
            "settings": {},
            "extensions": [
                "ms-python.python",
                "ms-python.vscode-pylance"
            ]
        },
        "forwardPorts": [8501],
        "runArgs": ["--env-file",".devcontainer/devcontainer.env"]
    }
}

This is my Dockerfile:

FROM python:3.10-bullseye

COPY requirements.txt ./requirements.txt

RUN pip install oscrypto@git+.git@d5f3437ed24257895ae1edd9e503cfb352e635a8

# COPY src ./src
# WORKDIR /src
RUN pip install --no-cache-dir -r requirements.txt

ENV PYTHONPATH=/workspaces/my_project/src

EXPOSE 8001
CMD ["streamlit", "run", "view/frontend/main.py"]

And this is my launch.json:

{
    "version": "0.2.0",
    "configurations": [        
        {
            "name": "Python: Current File",
            "type": "debugpy",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal",
            "justMyCode": true,
            "env": {"PYTHONPATH": "${workspaceFolder}/src"}
        },
        {
            "name": "Python:Streamlit",
            "type": "debugpy",
            "request": "launch",
            "module": "streamlit",
            "args": [
                "run",
                "${file}",
                "--server.port",
                "8501",
                "--server.fileWatcherType",
                "poll",
                "--server.address",
                "0.0.0.0"
            ],
            "cwd": "${workspaceFolder}/src",
            "env": {
                "PYTHONPATH": "${workspaceFolder}/src",
                "PYTHONHOME": "/usr/local/bin"
            }
        }
    ]
}

I have tried a lot of configurations, but I failed to find one that works.

EDIT I have pylance and streamlit workinng together in another computer with a VSC Dev Container over Windows, and they work perfectly.

This is what I get with python -m site:

sys.path = [
    '/workspaces/sacbeh',
    '/workspaces/sacbeh/src',
    '/usr/local/lib/python310.zip',
    '/usr/local/lib/python3.10',
    '/usr/local/lib/python3.10/lib-dynload',
    '/usr/local/lib/python3.10/site-packages',
]
USER_BASE: '/root/.local' (doesn't exist)
USER_SITE: '/root/.local/lib/python3.10/site-packages' (doesn't exist)
ENABLE_USER_SITE: True

I have a Python project in Ubuntu 24.04.1 LTS and I have a DevContainer in VSC with Debian GNU/Linux 11, the problem is that Pylance is flagging import streamlit as st with Import "streamlit" could not be resolved. If I run the application from the terminal with streamlit run myfile.py, it runs perfectly, but launching the debugger raises this exception:

EDIT I reset the Docker image, and the exception changed to a simpler one:

/usr/bin/python3: No module named streamlit

This is my devcontainer.json:

{
    "build": {"dockerfile": "Dockerfile"},
    "customizations": {
        "vscode": {
            "settings": {},
            "extensions": [
                "ms-python.python",
                "ms-python.vscode-pylance"
            ]
        },
        "forwardPorts": [8501],
        "runArgs": ["--env-file",".devcontainer/devcontainer.env"]
    }
}

This is my Dockerfile:

FROM python:3.10-bullseye

COPY requirements.txt ./requirements.txt

RUN pip install oscrypto@git+https://github/wbond/oscrypto.git@d5f3437ed24257895ae1edd9e503cfb352e635a8

# COPY src ./src
# WORKDIR /src
RUN pip install --no-cache-dir -r requirements.txt

ENV PYTHONPATH=/workspaces/my_project/src

EXPOSE 8001
CMD ["streamlit", "run", "view/frontend/main.py"]

And this is my launch.json:

{
    "version": "0.2.0",
    "configurations": [        
        {
            "name": "Python: Current File",
            "type": "debugpy",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal",
            "justMyCode": true,
            "env": {"PYTHONPATH": "${workspaceFolder}/src"}
        },
        {
            "name": "Python:Streamlit",
            "type": "debugpy",
            "request": "launch",
            "module": "streamlit",
            "args": [
                "run",
                "${file}",
                "--server.port",
                "8501",
                "--server.fileWatcherType",
                "poll",
                "--server.address",
                "0.0.0.0"
            ],
            "cwd": "${workspaceFolder}/src",
            "env": {
                "PYTHONPATH": "${workspaceFolder}/src",
                "PYTHONHOME": "/usr/local/bin"
            }
        }
    ]
}

I have tried a lot of configurations, but I failed to find one that works.

EDIT I have pylance and streamlit workinng together in another computer with a VSC Dev Container over Windows, and they work perfectly.

This is what I get with python -m site:

sys.path = [
    '/workspaces/sacbeh',
    '/workspaces/sacbeh/src',
    '/usr/local/lib/python310.zip',
    '/usr/local/lib/python3.10',
    '/usr/local/lib/python3.10/lib-dynload',
    '/usr/local/lib/python3.10/site-packages',
]
USER_BASE: '/root/.local' (doesn't exist)
USER_SITE: '/root/.local/lib/python3.10/site-packages' (doesn't exist)
ENABLE_USER_SITE: True

• python
• docker
• ubuntu
• containers
• pylance

Share Improve this question Follow edited Nov 26, 2024 at 6:54 fgu 30811 silver badge1313 bronze badges asked Nov 16, 2024 at 18:41 HuLu ViCaHuLu ViCa 5,4661212 gold badges5252 silver badges114114 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 0

Yeah, it's unclear what's going on there. I can easily reproduce such behavior with python 3.13.0 under macOS.

$ cat st.py && python st.py && echo && pyright st.py
import streamlit
print('Hello, world!')

Hello, world!

st.py:1:8 - error: Import "streamlit" could not be resolved (reportMissingImports)
1 error, 0 warnings, 0 informations 

solution

I recommend you move on to another linter when working with streamlit:

$ mypy st.py 
Success: no issues found in 1 source file

It also accepts switches like --ignore-missing-imports if you continue to run into trouble. I usually find it most helpful when executed using --strict.

---

But, does this solve the debugging error, or just the linting

There's two questions posed. I answered the first one, by suggesting the use of a non-broken linter.

In a subsequent edit you explained

I reset the Docker image, and the exception changed to a simpler one:

/usr/bin/python3: No module named streamlit

Well, that seems pretty straightforward to fix. I don't know what the verb "reset" means here, but the symptom shows that "broke" is an appropriate verb. Your sys.path is not pointing at a venv with streamlit installed. (Or, IDK maybe you're shooting for system level library installs, and streamlit isn't installed. Yeah, RUN pip install ... -r requirements.txt looks like it uses a system-wide folder such as /usr/local. It's not obvious to me how the interpreter in /usr/bin is going to find /usr/local folders. I usually rely on python -m venv and then source activate, but you have gone down a different config path in your container.)

It's easy enough to fix up "missing deps". Start with $ which python to verify that the interpreter you think is running truely is the one that does run. Then $ python -m site offers a convenient way to see which directories import consults. Adjust the PYTHONPATH env var if your favorite folder is missing.

Sometimes $ which pip shows it is coming from a different place. Installing deps with $ python -m pip install streamlit foo bar baz is more robust, as the install is guaranteed to use the same interpreter and same venv as the execution environment.

Running

$ find /workspaces/sacbeh /usr/local/lib/python3.10/site-packages |
    grep streamlit

should reveal where pip installed the library. If it is absent, then streamlit imports won't succeed. (BTW, USER_BASE and USER_SITE not existing is definitely not a problem, don't worry about that.)

---

If code runs fine from ENTRYPOINT or a bash prompt, but not from an IDE, one can always use the stopgap of inserting a breakpoint() call in the code, until the IDE can be coaxed into working again. An if statement can even conditionally enter the standard debugger.

本文标签： pythonPylance failing to resolve import of libraries in a devcontainer in LinuxStack Overflow