import random
from ldap3 import Connection, Server, NTLM, ALL, ALL_ATTRIBUTES, ALL_OPERATIONAL_ATTRIBUTES

def get_ldap_grp_members(
    ldap_conn,
    group_name,
    search_base='dc=WIRECARD,dc=LAN',
    attr_name='sAMAccountName'
):
    res = []
    ldap_conn.search(search_base, "(&(CN={}))".format(group_name))
    for cn in ldap_conn.entries:
        ldap_conn.search(search_base,
                         '(memberOf={})'.format(cn.entry_dn),
                         attributes=[ALL_ATTRIBUTES])
        #print("parsing: [{}]".format(cn.entry_dn))
        res.extend([x.entry_attributes_as_dict.get(attr_name)[0]
                    for x in ldap_conn.entries])
    return list(set(res))

ldap_srv_list = ["ldap1.company.com","ldap2.company.com","ldap3.company.com"]
ldap_srv = Server(random.choice(ldap_srv_list), get_info=ALL)

user=r'DOMAIN_NAMEwindows_login'
pwd='windows_password'

c = Connection(ldap_srv, user=user, password=pwd, authentication=NTLM, auto_bind=True)

users = get_ldap_grp_members(c, 'AD_group_name', search_base='dc=LAN')

users = get_ldap_grp_members(c, 'Group*Admin*', search_base='dc=LAN')