[Tutor] problem loading and array from an external file
wallenpb at gmail.com
Thu Aug 12 01:46:41 CEST 2010
On Tue, Aug 10, 2010 at 11:11 AM, Hugo Arts <hugo.yoshi at gmail.com> wrote:
> On Tue, Aug 10, 2010 at 9:59 AM, bob gailer <bgailer at gmail.com> wrote:
>> On 8/10/2010 10:42 AM, Bill Allen wrote:
>>> I was really off on that algorithm and had way over complicated it.
>>> I have it working correctly now, but for the sake of those who saw my
>>> earlier really botched code, here is the resultant code that works.
>>> The entire inner loop and intermediate variables are removed, but
>>> shown commented out. I had somehow thought I needed to read each
>>> member of each subarray in individually. That was not the case and
>>> that inner loop was overwriting the array.
>>> # reads one line at a time from file and puts data into array
>>> for line in textf:
>>> #tempwords = line.split(None)
>>> #for n in range(0, len(room)-1):
>>> # roomx[n] = tempwords[n]
>>> #room[m] = roomx
>>> room[m] = line.split(None)
>>> m += 1
>> Great. Good work. Teach a man to fish?
>> Now for the refinements. First you can use enumerate to obtain the room
>> for m, line in enumerate(textf):
>> room[m] = line.split(None)
>> Second you can start with an empty list and append:
>> rooms = 
>> for line in textf:
>> Third you can use list comprehension:
>> rooms = [line.split(None) for line in textf]
> Nice going, this is the best way of getting your answer from the
> tutors list IMO, high fives all around. I wish more threads went like
> You don't actually have to specify the None in line.split AFAIK, but
> it might be better to be explicit. thoughts on this, anyone?
I had wondered about the use of None in that context. I had seen it
used that way in some examples and just followed suit. Just do
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