Allow restricted bash users to run specific python script

I need to allow a particular user to run a specific python script. This user has access to a restricted bash which for now allows only the clear command.
Usually, the script would be run through python3 script_name.py. In this case, the goal is to restrict the users capabilities at the maximum. Thus, I would like to not give access to the python3 command to the user.
Is there a way to restrict the use of the python3 command to the specific python3 script_name.py or a way to automatically and temporarily switch user to an authorized one, run the script, and then switch back to the original user?
Thanks a lot!

Edit:
While searching further information regarding the capabilities of the restricted shell and its configuration, I found this page, on which is said:

When a command that is found to be a shell script is executed (see Shell Scripts), rbash turns off any restrictions in the shell spawned to execute the script.

Does this mean that creating a .sh file containing python3 script_name.py in the base folder for the user and adding the execution rights to this file should solve my issue? It is after all a shell script and thus should be exempted from restrictions.

Update: While a script didn't solve my issue, @muru pointed me to a functional workaround.
I created a "launcher.py" executable file in the user's commands location containing only the following:

#! /usr/bin/python3

import sys
sys.path.insert([1], <path_to_actual_script>)

import <actual_script>

This allows the user to run the launcher.py command while not directly having access to the program.

This is posible in theory. You have to:

1. Install firejail - sandbox in Ubuntu. It is suitable for apps provided in deb and appimage packages;
2. Create custom firejail profile for bash (restricted to use sudo, python3 and script_name.py);
3. Create script restricted_bash.sh - it has to start bash in firejail with custom bash profile;
4. Change user shell in /etc/passwd to restricted_bash.sh;
5. Modify script_name.py: add #!/usr/bin/python3 as first line.

Note: This is not tested!

Note: The disadwantage is that you have give user access to the python3 - is normal because firejail restrictions are destiny and probably can not be escalated on demand (e.g. when you run script_name.py).

Note: bash have many build in commands, and you can not disable them in that way. In order to drop them all you will have to use other shell or even create custom restricted shell.