subprocess call's env passing
#!/usr/bin/python
import os, subprocess
env = os.environ.copy()
env['PASSWD'] = "hello jian"
retcode = subprocess.call("smbclient -L //10.60.1.11  -U Mikejian"),env=env)
print retcode

def _validateSMBPassword(self, username, password):
    debug("call _validateSMBPassword %s:%s " % (username, password))
    import subprocess, os, shlex
    cmd = "sudo smbclient -L //%(server)s -U %(user)s"
    cmd = cmd % {
        'server' : "10.60.1.11",
        'user' : "Mikejian",
        }
    env = os.environ.copy()
    env['PASSWD'] = "hello jian"
    retcode = subprocess.call("smbclient -L //10.60.1.11  -U Mikejian",env=env,shell=True)
    debug("retcode:%d" % retcode)
    if retcode == 0:
        return True, True
    return False, False

>>> smb = smbclient.SambaClient(server="MYSERVER", share="MYSHARE",
...     username='foo', password='bar', domain='baz')
...
>>> print smb.listdir("/")
[u'file1.txt', u'file2.txt']
>>> f = smb.open('/file1.txt')
>>> data = f.read()
>>> f.close()
>>> smb.rename(u'/file1.txt', u'/file1.old')