使用python的LDAP

有人能帮我把下面的shell脚本转换成python（版本2.6.6）

外壳代码：

ldapsearch -x -h ldap.bbc.network.lcl -p 3477 -b "DC=bbc,DC=network,DC=lcl" -D "CN=LDAP\, Mine,OU=Resource Accounts,OU=Enterprise,DC=bbc,DC=network,DC=lcl" -w passwd $1

import ldap

l = ldap.initialize('ldap://ldap.bbc.network.lcl')

username = "DC=bbc, DC=network, DC=lcl"

password = "passwd"

l.protocol_version = ldap.VERSION3

l.simple_bind_s(username, password)

base = ""

scope = ldap.SCOPE_SUBTREE

filter = "cn=" + "*" + 'Mine' + "*"

retrieve_attributes = None

result_id = l.search(base, scope, filter, retrieve_attributes)

Python代码：

ldapsearch -x -h ldap.bbc.network.lcl -p 3477 -b "DC=bbc,DC=network,DC=lcl" -D "CN=LDAP\, Mine,OU=Resource Accounts,OU=Enterprise,DC=bbc,DC=network,DC=lcl" -w passwd $1

import ldap

l = ldap.initialize('ldap://ldap.bbc.network.lcl')

username = "DC=bbc, DC=network, DC=lcl"

password = "passwd"

l.protocol_version = ldap.VERSION3

l.simple_bind_s(username, password)

base = ""

scope = ldap.SCOPE_SUBTREE

filter = "cn=" + "*" + 'Mine' + "*"

retrieve_attributes = None

result_id = l.search(base, scope, filter, retrieve_attributes)

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请帮助我将其转换为python

我在python中使用的用户名和密码是否与shell相同？因为我从shell代码中获取了无效的凭据错误。我可以知道，用户名和密码是什么吗？我可以知道，这里的“-b”是什么意思