flock 0.1

Flock object uses fcntl.flock to lock (resp. unlock) file descriptor (fd) with operation (op) when entering (resp. leaving) runtime context related to it.

flock.Flock(fd, op)

Flock object uses fcntl.flock to lock (resp. unlock) file descriptor (fd) with operation (op) when entering (resp. leaving) runtime context related to it.

File objects providing a fileno() method are accepted as well.

Operation is one of the following values:

• LOCK_SH - acquire a shared lock

• LOCK_EX - acquire an exclusive lock

Operation can also be bitwise ORed with LOCK_NB to avoid blocking on lock acquisition.

Example:

with open(‘/tmp/file.lock’, ‘w’) as f:

blocking_lock = flock.Flock(f, flock.LOCK_EX) noblocking_lock = flock.Flock(f, flock.LOCK_EX|flock.LOCK_NB)

with blocking_lock:

pass # do something here

try:

with noblocking_lock:

pass # do something else here

except BlockingIOError:

pass