Traceback NameError in python tutorial

Question

I'm reading an online python tutorial book from here. The code is listed below. When I execute the code, I can type words into it but then it gave me the error below. What is the wrong with the code?

On a related note, if you have a better resource for leaning python, please let me know. I'm looking for one that is online and updated often (ex: railstutorial.org). The resource I am using have plenty of errors even this early in the book. Thanks.

Enter something : programmig is fun
Traceback (most recent call last):
  File "break.py", line 5, in <module>
    s = input('Enter something : ')
  File "<string>", line 1, in <module>
NameError: name 'programmig' is not defined

#!/usr/bin/python
# Filename: break.py

while True:
    s = input('Enter something : ')
    if s == 'quit':
        break
    print('Length of the string is', len(s))
print('Done')

Matthew Adams · Accepted Answer · 2012-10-24 20:30:14Z

2

This is python 3 code. It seems like you're running it with python 2.

Run python --version to check which version of python you are using.

edited Oct 24, 2012 at 20:30

answered Oct 24, 2012 at 20:24

Matthew Adams

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3 Comments

oky_sabeni Over a year ago

I have python 2.7.2 which is sad because the book explicitly said that he is using python 2.7.2.

oky_sabeni Over a year ago

Well, actually he said he was using python 3 then switch and now he has a mixture of python 2 and 3 codes lol

Matthew Adams Over a year ago

Odd. I can tell this is 3 because: print is a function and input is expected to act like the old raw_input. Also, it runs just as you'd expect in python 3.

BrtH · Accepted Answer · 2012-10-24 20:25:25Z

1

input() doesn't get a string, so it thinks that programmig is a variable. You can type the input you want in quotes to solve this.
A better way however, is to use raw_input, which returns a string.
So either do Enter something : 'programmig is fun', not recommended, or do s = raw_input('Enter something : ') recommended way

The cause of the confusion is that the book is probably for python 3, which has a different input, and also a different print, while you are using python 2.x.

answered Oct 24, 2012 at 20:25

BrtH

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3 Comments

Matthew Adams Over a year ago

This is true for python 2, but judging by the function print, this is python 3.

BrtH Over a year ago

@MatthewAdams, so probably he's running python 2.x while having a python 3 tut.

Matthew Adams Over a year ago

I'd bet that's what's going on.

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