How to open a program with a batch file and set data in it?

Question

cmd/bat

How to write a .bat file that will open a program (python program, interface in the console) and enter the data I need into it.
The program has several functions that open when you write the desired number (number of functions).
The batch file should open the program and write, for example, the number 5.

Answer 1

Read about what the batch file does and why it is needed at all. Also read about passing Python arguments to a script via the command line.
Here no one will write the code for you.

Answer 2

You fill in the input information into a text file, then you redirect this file to the stdin of your program:
python myscript.py <file.txt

Answer 3

The batch file must open the program and write, for example, the number 5

echo 5| python script.py