On Oct 24, 7:06 am, [EMAIL PROTECTED] wrote:
> I am working on a file locking class which I'd like to work with Python
> 2.5's context managers. The acquire method takes an optional timeout
> argument:
>
> class FileLock:
> ...
> def acquire(self, timeout=None):
> ...
>
> def __enter__(self):
> self.acquire()
> return self
>
> Can that optional timeout be somehow accommodated by the with statement?
> (I'm thinking no, which may not be a big shortcoming anyway.)
>
> Thx,
>
> Skip
I think a better solution might be to create a locking class, and a
seperate context manager class. That way you can pass the timeout as a
parameter to the context managers constructor:
[code]
fl = FileLock(...)
with FileLockContext(filelock=fl, timeout=1000):
# do stuff
[/code]
But another option along the same line might be to have the acquire
method return the context instance. Then you could write:
[code]
class FileLockContext(fl, timeout):
...
class FileLock:
...
def acquire(self, timeout=None):
# do acquiring
return FileLockContext(self, timeout)
fl = FileLock(...)
with fl.acquire(1000):
#do stuff
[/code]
Or, you could go the same path you are already, using a hybrid, and
pass timeout to the FileLock constructor.
Matt
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