Why does Gvim treat ansi escape codes differently than Vim in python code?

Question

The following python code uses ansi escape sequences to clear the terminal screen and change the text color to red. It then prints "Hello from Vim."

print ('\033c\033[31m Hello from Vim.')

In Vim I use the command :!python3 % and everything works as expected. It clears the screen and prints in red. However, when I load the same code into Gvim and use the same command I get :

?c?[31m Hello from Vim.

It neither clears the screen nor prints in red. If from Gvim I split to the terminal with :term and then enter python3 tester.py, then code works correctly.

So my question is : Why does the command :!python3 % not work the same in Gvim as it does in Vim when it comes to ansi escape codes and what can I do to correct that?

Thank you for your assistance.

Edit: Additionally when I run this python script in Gvim :

i = input ('test: ')

and try to use the Backspace key to change the input, I get ^H printed out instead of the cursor backing over the input.