MalteseUnderdog wrote:
Hi there I just started python (but this question isn't that trivial
since I couldn't find it in google :) )
I have the following text file entries (simplified)
start #frag 1 start
x=Dog # frag 1 end
stop
start # frag 2 start
x=Cat # frag 2 end
stop
start #frag 3 start
x=Dog #frag 3 end
stop
....
I need a regex expression which returns the start to the x=ANIMAL for
only the x=Dog fragments so all my entries should be start ...
(something here) ... x=Dog . So I am really interested in fragments 1
and 3 only.
As I understand the above....
I would first write a generator that separates the file into fragments
and yields them one at a time. Perhaps something like
def fragments(ifile):
frag = []
for line in ifile:
frag += line
if <line ends fragment>:
yield frag
frag = []
Then I would iterate through fragments, testing for the ones I want:
for frag in fragments(somefile):
if 'x=Dog' in frag:
<do whatever>
Terry Jan Reedy
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