Hi, Shane,
Thanks for fast reply.
What I used is :
for line in open(FILE):
<do stuff>
I don't want to store all lines in a list because sometimes the file is very
large. We need to store the value of the previous line in a variable. Is that
right?
Thanks,Qilong
----- Original Message ----
From: Shane Geiger <[EMAIL PROTECTED]>
To: Qilong Ren <[EMAIL PROTECTED]>
Sent: Friday, March 16, 2007 1:51:09 PM
Subject: Re: How to get the previous line in a file?
lines = open('/tmp/foo.py',
"r").read().splitlines()
previous_line =
''
for line in
lines:
if "foo" in
line:
print "found foo in the current line. The previous line is: "
+
previous_line
Qilong Ren wrote:
> Hi,all
>
> I am new to this list. And I am glade I am here.
> I have a question. I need to do some text processing. I need to read
> from a file line by line. If some line is met with some condition, the
> previous line needs some modification. How to get the info of the
> previous line?
>
> Thanks!
> Qilong
>
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--
Shane Geiger
IT Director
National Council on Economic Education
[EMAIL PROTECTED] | 402-438-8958 | http://www.ncee.net
Leading the Campaign for Economic and Financial Literacy
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