On 26/02/15 04:30, kcberry wrote:
So I am new to this, and I have a book call /Hello Python by Anthony Briggs/.
It is a good book but it is using Python 2 I think and I can't get my code
to work. I get an "AttributeError: 'range' object has no attribute
'remove'". I have tried to look it up on the web with no luck. Can someone
help me understand this .
Please always send full error traces, they contain a lot of useful details.
Meantime in this case we can figure it out...
#Setting up cave network
unvisited_caves = range(0,20)
current = 0
visited_caves = [0]
*unvisited_caves.remove(0)*
In Python 3 eange does not return a list. It returns something called a
"range object" which helps save memory for large daya sets.
If you need to use it as a list you need to explicitly
convert it using list():
unvisited_caves = range(0,20)
...
unvisited_caves.remove(0)
However remove() may not do what you think. It removes the
value zero from your list not the first element. I this case they are
the same but in other cases they might not be. You may want to use del()
instead
del(unvisited_caves[0])
HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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