[Tutor] Print record x in a file

[Liam Clarke]

Don't you mean 

x=random.randint(0, lenoflist) ?? I'm assuming you want an integer.


On Sun, 23 Jan 2005 21:55:27 +0000 (GMT), David Holland
<davholla2002 at yahoo.co.uk> wrote:
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> ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sun, 23 Jan 2005 07:46:08 -0500
> > From: Kent Johnson <kent37 at tds.net>
> > Subject: Re: [Tutor] Print record x in a file
> > Cc: tutor python <tutor at python.org>
> > Message-ID: <41F39C90.60602 at tds.net>
> > Content-Type: text/plain; charset=ISO-8859-1;
> > format=flowed
> >
> >   Since len(listcontents) is one greater than the
> > largest valid index of listcontents, the correct
> > use of randrange() for this problem is
> >    x = random.randrange(0, len(listcontents))
> >
> 
> 
> Kent,
> 
> I know that you know far more about python than me but
> is that right ?
> I created file with 4 records and this code did print
> them all randomly:-
> 
> import random
> i = 0
> while i < 10:
>     file = open('filename')
>     listcontents = file.readlines()
>     file.close()
>     lenoflist = len(listcontents)-1
>     x = random.randrange(0,lenoflist)
>     print listcontents[x], i
>     i = i +1
> 
> While although this code below does work many times
> nothing is printed out.
> import random
> i = 0
> while i < 10:
>     file = open('test.rantxt')
>     listcontents = file.readlines()
>     file.close()
>     lenoflist = len(listcontents)#-1
>     x = random.randrange(0,lenoflist)
>     print listcontents[x], i
>     i = i +1
> 
> 
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