How can I start running Python files after closing the Ubuntu terminal? In other words how to get a prompt like this in Ubuntu termial: (my_env)rashid@rashid-DH55TC: ~/environments$: This will enable me to execute .py file.
To execute .py files, simply run the command
python name_of_file.py
See this link for more details.
If you are asking about activating your virtual environment (so that in the terminal you see (my_env)rashid@rashid......... ) enable or activate your virtual environment using the command
$ source myenv/bin/activate
That will change
rashid@rashid-DH55TC: ~/environments$:
to
(my_env)rashid@rashid-DH55TC: ~/environments$:
(my_env) is the name of the virtual environment and it's presence shows that you are now in a virtual environment.