[Python] Python Venv won't connect to virtual environment

I'm trying to install any packages to venv, but the pip install command's target directory is always /opt/homebrew/lib/python3.12/site-packages/, but I'd expect it to be something under venv.

Here is how to replicate in my local machine:

1. python3.12 -m venv venv to create venv
2. source venv/bin/activate to load the environment
3. My which python3.12 and which pip3.12 all points to the correct path, i.e., <repo_directory>/venv/bin/python3.12

Then, when I try pip3.12 install hello-world, it shows:

Collecting hello-world
Using cached hello_world-0.2-py3-none-any.whl
Installing collected packages: hello-world
Successfully installed hello-world-0.2
WARNING: Target directory /opt/homebrew/lib/python3.12/site-packages/hello.py already exists. Specify --upgrade to force replacement.
WARNING: Target directory /opt/homebrew/lib/python3.12/site-packages/hello_world-0.2.dist-info already exists. Specify --upgrade to force replacement.
WARNING: Target directory /opt/homebrew/lib/python3.12/site-packages/bin already exists. Specify --upgrade to force replacement.


I have been stuck here for days. Any help is appreciated!

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