Why python pop up message syntax error

[hfsoon]

Hi expert,

I was starting to pick up Python as beginner. Follow the instruction in Computer Hope tutorial accordingly.
Version of Python use is 3.8.3

The interface return a message below:

 >>>     py read.py
File "<stdin>", line 1
    py read.py
       ^
SyntaxError: invalid syntax

May anyone know what mistake I made on the line above ?
Appreciate your time to the matter
Regard

A snapshot of error message provided in attachment

[hfsoon]

Hi all,

I think I got the answer, the command actually can be executed directly from cmd prompt.
Thus it is working fine.

Thank you