Appending raw input to a list

Question

This is the simplest of exercises. I just don't understand why it wont work.

Here's my code:

hobbies = []
for i in range(3):
    hobby = raw_input("Name a hobby")
    hobbies = hobbies.append(hobby)

Basically I want to ask my user 3 times to name one of his hobbies, and store them in a list. But for some reason I'm getting this error,

Traceback (most recent call last):
  File "C:/Python27/hobbies.py", line 4, in <module>
    hobbies = hobbies.append(hobby)
AttributeError: 'NoneType' object has no attribute 'append'

which I don't really understand.

I have no idea why these hyperlinks to adverts are there. I didn't put them in. — mdemont, Jun 20 '14 at 13:06
Could someone explain why theres so many adverts in my post if I didn't put them in there??? — mdemont, Jun 20 '14 at 13:49
you could consider accepting one of the answers below. Remember that you get a +2 reputation by doing that... — Saullo G. P. Castro, May 25 '15 at 00:23

score 3 · Answer 1 · answered Jun 20 '14 at 13:03

3

The problem is that append() will change the list in-place. And when you call this function no value is returned.

The first time you get a None value for the variable hobbies. The second time you try to call the append() method for a None value...

answered Jun 20 '14 at 13:03

Saullo G. P. Castro

56,802
26
179
234

score 0 · Accepted Answer · edited Jun 20 '14 at 13:05

0

You should not use hobbies = hobbies.append(). Instead use hobbies.append() only.

edited Jun 20 '14 at 13:05

answered Jun 20 '14 at 13:05

Vinay

325
1
8

Appending raw input to a list

2 Answers2