Going thru tutorials..."NameError: name 'raw_input' is not defined"

[hmonnier]

I'm a total newbie, wrote machine code for years at GE, Digital Communications stuff. Off to try to learn Python.
In going thru the tutorials in one of the 'dummies' books, they have an example using raw_input(), and I get this error message

Error:
"NameError: name 'raw_input' is not defined"

now I presume i have not loaded some needed library. I downloaded and installed python 3.8, is there something else I must do?
Thanks, Henri Monnier