Python - except (OSError, e) - No longer working in 3.3.3?

The following have worked throughout Python 3.X and is not broke in 3.3.3, can't find what's changed in the docs.

import os

def pid_alive(pid):
    pid = int(pid)
    if pid < 0:
        return False
    try:
        os.kill(pid, 0)
    except (OSError, e):
        return e.errno == errno.EPERM
    else:
        return True

Tried different variations of the except line, for instance except OSError as e: but then errno.EPERM breaks etc.

Any quick pointers?