How to fix NameError when running Python Script in Windows Command Prompt

Question

I ran a python file, named jbA.py in windows command prompt, with the following commands, orderly:

1. python
2. jbA.py

It displays the following error:

Traceback (most recent call last): 
  File "<stdin>", line 1, in <module>
NameError: name 'jbA' is not defined

Can anyone help to fix the above mentioned error? Thank you.

Answer 1

when you type python you are moving to the python commandline tool. Now there is no context for your file jbA.py .

To execute a python file, type python <filename>.py .

In your case, it is python jbA.py . For python 3.x, you may use python3 jbA.py

Answer 2

To run pyhton script open command prompt

1) for python version greater then 3:- python3 filename.py

2) for python version 2:- python filename.py

no need to open python console

Answer 3

Have you checked that python is in your Environment PATH variable list? Try typing

python --version

in your windows command prompt and see if you get an error. If it does not return a version number, it has not been added to your PATH. If you don't know how to do this, refer to this link - https://www.java.com/en/download/help/path.xml