Reverse a list in python

Question

How to reverse a list in python? I tried:

a = ["abc", "def", "ijk", "lmn", "opq", "rst", "xyz"]
print a
a = reversed(a)
print a

But I get a <listreverseiterator object at 0x7fe38c0c> when I print a the 2nd time.

You sure you don't get ``? – David Robinson Aug 19 '13 at 18:37 — David Robinson, Aug 19 '13 at 18:37
use slices: `a[::-1]` – Ashwini Chaudhary Aug 19 '13 at 18:37 — Ashwini Chaudhary, Aug 19 '13 at 18:37
Or you can do `a = list(reversed(a))` – David Robinson Aug 19 '13 at 18:38 — David Robinson, Aug 19 '13 at 18:38
@michael use .reverse() – Boruto Uzumaki Dec 18 '20 at 09:08 — Boruto Uzumaki, Dec 18 '20 at 09:08

score 2 · Answer 1 · answered Aug 19 '13 at 18:39

2

use a[::-1]

its the pythonic way of doing it.

answered Aug 19 '13 at 18:39

Hrishi

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score -1 · Answer 2 · answered Aug 19 '13 at 18:38

-1

print a[::-1]

you could use this

answered Aug 19 '13 at 18:38

Vaibhav Aggarwal

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score -1 · Answer 3 · edited May 23 '17 at 11:56

Python gives you a very easy way to play around with lists

Python 2.7.3 (default, Apr 24 2013, 14:19:54)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = ["abc", "def", "ijk", "lmn", "opq", "rst", "xyz"]
>>> a
['abc', 'def', 'ijk', 'lmn', 'opq', 'rst', 'xyz']
>>> a[::-1]
['xyz', 'rst', 'opq', 'lmn', 'ijk', 'def', 'abc']
>>>

And you can read up more on slincing in this very helpful SO post: Explain Python's slice notation

Reverse a list in python

3 Answers3