palindrome function

[Terry Reedy]

Mensanator wrote:

> It hasn't. and here's why:
> 
> IDLE 2.6b1
>>>> seq=['a','n','n','a']
>>>> seq.reversed()
> 
> Traceback (most recent call last):
>   File "<pyshell#3>", line 1, in <module>
>     seq.reversed()
> AttributeError: 'list' object has no attribute 'reversed'

My apologies.  reversed() is a builtin func, not a method, and it 
produces an iterator, not a seq.  SO, corrected,

 >>> for s in ((1,2,3,2,1), [1,2,3,2,1]):
...   type(s)(reversed(s)) == s
...
True
True
 >>> s = '12121'
 >>> ''.join(reversed(s)) == s
True