How to write a file generator
Thomas Jollans
t at jollybox.de
Tue Jul 12 11:52:50 EDT 2011
On 07/12/2011 04:46 PM, 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
>
>
> 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.
>
> --
> Bill
http://stackoverflow.com/questions/1475950/tail-f-in-python-with-no-time-sleep
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