util: improved the check for the existence of the 'buffer' builtin
2to3 is unable to translate '__builtin__' calls to 'builtins' when
hasattr is used (as in hasattr(__builtin__, buffer)). Translating the
check to the format
try:
whatever
except NameError
# define whatever
__builtin__.whatever = whatever
is a correct way of checking for the name and has the benefit of being
translated by 2to3. This patch implements the same idea for the
aforementioned example.
#!/usr/bin/env python
import os, time, errno, signal
# Kill off any leftover daemon processes
try:
fp = open(os.environ['DAEMON_PIDS'])
for line in fp:
try:
pid = int(line)
except ValueError:
continue
try:
os.kill(pid, 0)
os.kill(pid, signal.SIGTERM)
for i in range(10):
time.sleep(0.05)
os.kill(pid, 0)
os.kill(pid, signal.SIGKILL)
except OSError, err:
if err.errno != errno.ESRCH:
raise
fp.close()
except IOError:
pass