(self, timeout=None)
Acquire the lock.

        Creates the PID file for this lock, or raises an error if
        the lock could not be acquired.
Acquire the lock.
Acquire the lock .
def acquire(self, timeout=None):
        """ Acquire the lock.

        Creates the PID file for this lock, or raises an error if
        the lock could not be acquired.
        """

        timeout = timeout if timeout is not None else self.timeout
        end_time = time.time()
        if timeout is not None and timeout > 0:
            end_time += timeout

        while True:
            try:
                write_pid_to_pidfile(self.path)
            except OSError as exc:
                if exc.errno == errno.EEXIST:
                    # The lock creation failed.  Maybe sleep a bit.
                    if time.time() > end_time:
                        if timeout is not None and timeout > 0:
                            raise LockTimeout("Timeout waiting to acquire"
                                              " lock for %s" %
                                              self.path)
                        else:
                            raise AlreadyLocked("%s is already locked" %
                                                self.path)
                    time.sleep(timeout is not None and timeout / 10 or 0.1)
                else:
                    raise LockFailed("failed to create %s" % self.path)
            else:
                return
def acquire ( self , timeout = None ) : timeout = timeout if timeout is not None else self . timeout end_time = time . time ( ) if timeout is not None and timeout > 0 : end_time += timeout while True : try : write_pid_to_pidfile ( self . path ) except OSError as exc : if exc . errno == errno . EEXIST : # The lock creation failed.  Maybe sleep a bit. if time . time ( ) > end_time : if timeout is not None and timeout > 0 : raise LockTimeout ( "Timeout waiting to acquire" " lock for %s" % self . path ) else : raise AlreadyLocked ( "%s is already locked" % self . path ) time . sleep ( timeout is not None and timeout / 10 or 0.1 ) else : raise LockFailed ( "failed to create %s" % self . path ) else : return