Is it normal that tmuxp load ~/.tmuxp/foo.yaml prompts to a python process automatically?

[Ma-Nu-El]

Describe the problem:

Steps to reproduce:

1. start a simple tmux session
   For the sake of tracing, I bypassed my .tmux.conf so it's been reproduced in vanilla tmux.

2. While inside that tmux session
   $ tmuxp freeze
   (complete process to "freeze" session)

3. Exit 'tmux' session

4. Load 'tmux' session using (from $HOME/)
   $ tmuxp load .tmuxp/0.yaml

Observed Results:

From outside of tmux:
[Loading] /home/ma/.tmuxp/0.yaml

Once inside tmux, the prompt is presented as follows:

$  python3
Python 3.8.2 (default, Apr 27 2020, 15:53:34) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

I'm not by any means an expert in the terminal or even programming in general, but I assume that's a python program being executed right?

Expected Results:

I mean, the session should be restored as it was when it was saved isn't it?

Or at least, if it's not successfully saved, present a regular prompt.

To exit that prompt is as simple as typing exit(), however, in this manner, I can't rely on the freeze feature of 'tmuxp', which is what made me choose it in the first place. If I'm doing something wrong please let me know.

Required info

$ python3 --version
Python 3.8.2

$ echo $PATH
/home/ma/.local/bin:/home/ma/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

$ tmux -V
tmux 3.0a

$ tmuxp --version
tmuxp 1.5.4

$ command -v tmux
/usr/bin/tmux

$ command -v tmuxp
/home/ma/.local/bin/tmuxp

• don't know how to find libtmux version

$ echo $SHELL
/bin/bash

$ tmux list-sessions
no server running on /tmp/tmux-1000/default

• same output for all tmux related commands

$ tmuxp freeze
Convert to [yaml]: 
session_name: '0'
windows:
- focus: 'true'
  layout: b29d,90x24,0,0,0
  options: {}
  panes:
  - focus: 'true'
    shell_command: python3
  start_directory: /home/ma
  window_name: bash

---------------------------------------------------------------
Freeze does it best to snapshot live tmux sessions.

The new config *WILL* require adjusting afterwards. Save config? [y/N]: y
Save to: /home/ma/.tmuxp/0.yaml [/home/ma/.tmuxp/0.yaml]: 
Save to /home/ma/.tmuxp/0.yaml? [y/N]: y
Saved to /home/ma/.tmuxp/0.yaml.

Describe your environment

• Architecture: x86_64
• OS version: Ubuntu 20.04 focal

[Ma-Nu-El]

update

Turns out ,tmuxp freeze does actually freeze the session with a python3 process running even if you didn't run any python process whatsoever (check your ~/.tmuxp/foo.yaml). Completely unaware of if this is intentional and has an actual use in my favor that I don't know of.

From now on, I'll keep an eye on the freeze file and manually erase that python3 process every time I freeze a session.

Closing issue.