A newbie's question: How to run the code?

Python Help
1

So I’m taking an online course, in which the teacher shows how to run the code in Python 3.5.0b4. But in the program I’m using, Python 3.8.3 Shell, I see no such option:

Screenshot 1
Screenshot 1822×912 78.1 KB

So how do I run the code in Python 3.8.3 Shell? Thanks.

2

This works:

exec(open('full-path-and-filename').read())

A cautionary note:
The Python shell uses the UNIX forward slash, even if you’re running the Windows version (where backslash is used). An example of a full file-and-path-name is:

D:/programming/python/my_python_script.py

The same approach works from a Windows Command Prompt and, again, using the UNIX-style slash.

What’s actually going on here is a three-stage process. First, you access the OS and set up a file handle to the script in question. Second, you read the script file in, and finally, you execute it. Here are the stages separated for clarity:

file_handle = open('000_no_window.py')
my_script = file_handle.read()
exec(my_script)

4

Thanks a lot!