/home/pi/.local/bin is not on PATH

[hcccs]

Add it to $PATH, for example in the ~/.bashrc file, use

Output:
export PATH="$HOME/.local/bin:$PATH"

$PATH is not related to Python. It is the list of directories where the system looks for executable programs.

I installed w1thermsensor and it ended up in directory '/home/pi/.local/bin'. If I'm only going to access w1thermsensor from a Python program wouldn't it be enough to append the directory to sys.path?