Am 12.07.2011 16:46 schrieb Billy Mays:
I want to make a generator that will return lines from the tail of
/var/log/syslog if there are any, but my function is reopening the file
each call
...
I have another solution: an object which is not an iterator, but an
iterable.
class Follower(object):
def __init__(self, file):
self.file = file
def __iter__(self):
while True:
l = self.file.readline()
if not l: return
yield l
if __name__ == '__main__':
f = Follower(open("/var/log/messages"))
while True:
for i in f: print i,
print "foo"
import time
time.sleep(4)
Here, you iterate over the object until it is exhausted, but you can
iterate again to get the next entries.
Thomas
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