[Tutor] extracting lines between patterns.
alan.gauld at btinternet.com
Mon May 14 21:01:32 CEST 2012
On 14/05/12 08:31, Bala subramanian wrote:
> Could someone please give some hint on how to extract lines between two
> patterns in a file. I use the re module to compile my patterns but not
> able to figure out how i can use these patterns to extract the lines
> lying in between.
Without much detail here goes the generic pattern in pseudo code:
active_flag = False
for line in file:
if not active_flag:
if start_pattern in line:
active_flag = True
if end_pattern in line:
active_flag = False # or break if only one group possible
else: #process line
You can tweak the logic to make it more efficient but at the cost of
Hopefully that gives you a starting point.
Author of the Learn to Program web site
More information about the Tutor