On 7/12/2011 10:46 AM, Billy Mays wrote:
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:
def getLines():
with open('/var/log/syslog', 'rb') as f:
while True:
line = f.readline()
if line:
yield line
else:
raise StopIteration
Please use spaces rather than (disappearing) tabs in posted code.
I know the problem lies with the StopIteration, but I'm not sure how to
tell the caller that there are no more lines for now.
The same way you currently decide when to raise StopIteration
def tail(filename):
with open(filename, 'rb') as f:
while True:
yield f.readline()
When the caller gets '', it should go and do something else for awhile.
--
Terry Jan Reedy
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