On Tue, May 11, 2010 at 1:00 PM, ramya natarajan <[email protected]> wrote:
> Hello, I have to read lines from
> files exactly upto 1000 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
here's the pseudocode of what you're doing, it might help you
understand what the problem is:
for every line in the file:
if the character count is less than 1000, add the length of the
current line.
You are missing a condition.
Here is another version of your code that has the same problem, see if
this helps make it clearer:
lines, chars = 0,0
with open('/temp/new.txt') as f:
for line in f:
if chars > 1000: break
chars += len(line)
This sounds a lot like a homework problem so I won't give you the
answer, but I hope that helps.
Also do you realize you are counting newlines as well? You may not
want to do this, depending on your intended application.
Hope that helps,
-Luke
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