Python deployment

[snippsat]

Therefore if I use Pyinstaller, where can I save the code for the Dev environment?

The most normal way is to have eg a GitHub/Bitbucket... repo where code are.

And what if there is an error when the business users run the script in the PRD environment? How can I get the code for debugging or something like that?

Logging is used for this,i would recommend using loguru.

And one more question please, how can I deploy to other user devices?

I depends of what access you have to this,when use Pyinstaller it will be a stand alone(no install for users),so can just share the folder.
If user can install there self,then can point to Repo where code are.
If you have access,then can roll out the folder yourself.