[Newbie]Trouble with string method

[Sean Berry]

Try the following

unsorted = open('unsorted', 'r').readlines() -- two steps into one
unsorted.sort(lambda x, y: cmp(string.lower(x), string.lower(y)))
unsorted.close()
sorted = open('sorted', 'w')
sorted.writelines(unsorted)
soretd.close()

Your problem is that you are trying to use a string method on a list.


calpolynate <nathanjohns77 at hotmail.com> wrote in message
news:96fd272b.0403251442.49047ba9 at posting.google.com...
> I'm attempting to open a file, read the lines, sort them, change any
> uppercase character to lowercase, and output to another file:
>
> import string
>
> unsorted = open('unsorted', 'r')
> L = unsorted.readlines()
> L.sort()
> L = L.lower()
> sorted = open('sorted', 'w')
> sorted.writelines(L)
> unsorted.close()
> sorted.close()
>
> when trying to run, I get this traceback:
>
> Traceback (most recent call last):
>   File "sort_list.py", line 6, in ?
>     L = L.lower(L)
> AttributeError: 'list' object has no attribute 'lower'
>
> Do I need to somehow convert the list into strings?
>
> Thanks for any help!