in InterProcessLock, __init__ should be able to set default values arguments for acquire()

This would make its use as a context manager more flexible, eg with InterProcessLock(afile, delay=0.1, max_delay=1) as locked:

[pombredanne]

And I have tested this at scale on ~ 20K runs and it looks fine so far! Thanks

[psarka]

This feature is definitely on the list, but I currently I don’t like the API options for it 😦

I’ll note that while I’m stuck, the exception raising one is very easy to make yourselves on top of lock by just adding the method. Like this:

from contextlib import contextmanager

from fasteners import InterProcessLock


class FailedToAcquireException(Exception):
    pass


class WithTimeout(InterProcessLock):

    @contextmanager
    def locked(self, timeout):
        ok = self.acquire(timeout=timeout)
        if not ok:
            raise FailedToAcquireException()
        try:
            yield
        finally:
            self.release()


try:
    with WithTimeout('zzz').locked(100):
        ...  # exclusive access
except FailedToAcquireException:
    ...  # manage failure