Understanding PDM init Python interpreter selection

[robml]

So I love PDM, and want to slowly understand a bit more behind the scenes. Every time I initiate a project through pdm init I get the following options (note I only have Python3.8 on my system after removing the others):

Creating a pyproject.toml for PDM...
Please enter the Python interpreter to use
0. /usr/bin/python3.8 (3.8)
1. /usr/bin/python2.7 (2.7)
2. /home/robmel/.local/share/pdm/venv/bin/python (3.8)
Please select: [0]:

Now usually I would select 0 and call it a day, but I am curious what that last option: /home/robmel/.local/share/pdm/venv/bin/python (3.8) is, and why it's created? Also does it just reference the system python interpreter at the time of initiation or during all consequent visits as well? So far I have been using /usr/bin/python3.8 because the explicit declaration of python3.8 makes me more comfortable but curious what the other option is.

[frostming]

Because you have installed PDM via the install-pdm.py script, which creates a venv at the particular location of 2. for you. Then, it gets picked up as sys.executable inside the PDM process.