# File: pwd-example-2.py

import pwd
import os

# preload password dictionary
_pwd = {}
for info in pwd.getpwall():
    _pwd[info[0]] = _pwd[info[2]] = info

def userinfo(uid):
    # name or uid integer
    return _pwd[uid]

print userinfo(os.getuid())
print userinfo("root")

## ('effbot', 'dsWjk8', 4711, 4711, 'eff-bot', '/home/effbot', '/bin/bosh')
## ('root', 'hs2giiw', 0, 0, 'root', '/root', '/bin/bash')