[Tutor] how to read and write to a file

[Alexander]

On Wed, Jan 25, 2012 at 7:19 AM, ken brockman <krush1954 at yahoo.com> wrote:

> I would like to write to and read from a file from python. I wanted to use
> the file to save input to the program in a list. I have been looking around
> and there seems to be several ways to go about it. I tried pickling, but am
> having an issue with it. What would be the correct way to accomplish this?
> I have tried several ways, but to no avail. I get no error msg. but the
> list isn't retaining the info. Is pickling even the best way to do it.
>
> file1 = open("ArtyKlikes.p", "ab")  # likesList
> file2 = open("ArtyDislikes.p", "ab")  # dislikes
>
> pickle.dump(likesList, file1)
> pickle.dump(dislikeList, file2)
>
> file1.close()
> file2.close()
>
> Any help would be greatly appreciated.
>
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>
Hi Ken. If you just want to read and write from a text file then you don't
need to pickle.
For example,
(the file info.txt exists)

>>>fh = open ( 'info.txt', 'w' )
>>>fh.write ( 'peter piper picked a pack of pickled peppers.' )
>>>fh.close()
>>>fr = open ( 'info.txt', 'r')
>>>fr.readline()
'peter piper picked a pack of pickled peppers.'
>>>fr.close()

or whatever.
But do you have a need to use pickling?
-- 
Alexander
7D9C597B
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