Skip to main content

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

Project description

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

Project details


Release history Release notifications

This version

0.1

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for flock, version 0.1
Filename, size File type Python version Upload date Hashes
Filename, size flock-0.1.tar.gz (1.4 kB) File type Source Python version None Upload date Hashes View hashes

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page