On 12-May-2010, at 12:32 AM, spir ☣ wrote:
> On Tue, 11 May 2010 11:00:20 -0700
> ramya natarajan <[email protected]> wrote:
>
>> Hello,
>>
>> I am very beginner to programming, I got task to Write a loop that reads
>> each line of a file and counts the number of lines that are read until the
>> total length of the lines is 1,000 characters. I have to read lines from
>> files exactly upto 1000 characters.
>>
>> Here is my code:
>> I created file under /tmp/new.txt which has 100 lines and 2700 characters
>> , I wrote code will read exactly 1000 characters and count lines upto those
>> characters.But the problem is its reading entire line and not stopping
>> excatly in 1000 characters. Can some one help what mistake i am doing here?.
>>
>> log = open('/tmp/new.txt','r')
>> lines,char = 0,0
>> for line in log.readlines():
>> while char < 1000 :
>> for ch in line :
>> char += len(ch)
>> lines += 1
>> print char , lines
>> 1026 , 38 ---- Its counting entire line instead of character upto 1000
>> -- can some one point out what mistake am i doing here , where its not
>> stopping at 1000 . I am reading only char by car
>>
>> My new.txt -- cotains content like
>> this is my new number\n
>>
>> Can some one please help. I spent hours and hours to find issue but i am not
>> able to figure out, Any help would be greatly appreciated.
>> Thank you
>> Ramya
>
> Either you read line per line, but then you cannot stop exactly at the 1000th
> character; or you traverse the text char per char, but this is a bit picky.
> I would read line per line, and when count >= 1000, read chars inside current
> line to get to the 1000th, if needed.
> (Your specification does not state this, but your disappointment seems to be
> about that issue ;-)
>
> Denis
You can try read instead of readlines.
Something like...
print 'Number of lines till 1000th character:',
len(open('/tmp/new.txt','r').read(1000).split('\n'))
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