LDAP Query in Python3 - python-3.x

Question

I have an LDAP Query which is running perfectly fine in my terminal
ldapsearch -h ldap.mygreatcompany.com -D user#mygreatcompany.COM -w "$ldappassword" -b "DC=abc,DC=mygreatcompany,DC=com" -s sub "(mail=user1#mygreatcompany.COM)" sAMAccountName
I want to run this command in python3, I followed other answers from StackOverflow and wrote something like this,
import ldap
l = ldap.initialize('ldap://ldap.mygreatcompany.com')
binddn = "user#mygreatcompany.COM"
pw = #ldappassword
basedn = "DC=abc,DC=mygreatcompany,DC=com"
searchAttribute = ["sAMAccountName"]
searchFilter = "(&(mail=user1#mygreatcompany.COM')(objectClass=*))"
searchScope = ldap.SCOPE_SUBTREE
l.simple_bind_s(binddn, pw)
ldap_result_id = l.search_s(basedn, searchScope, searchFilter, searchAttribute)
#Get result
l.unbind_s()
But Here I am not getting the result from ldap_result_id. Can anybody help what is the correct way to do this query?
Thanks

Answer 1

It turns out that I was not using connection.set_option(ldap.OPT_REFERRALS, 0) in the code and there is some issue in LDAP which automatically chases the referrals internally with anonymous access which fails.
Here is the working code:
def get_user_id(email):
# Seach fiter for user mail
searchFilter = "mail={}".format(email)
try:
# binding to ldap server
connection = ldap.initialize('ldap://yourcompanyhost')
connection.set_option(ldap.OPT_REFERRALS, 0)
connection.protocol_version = ldap.VERSION3
connection.simple_bind_s(binddn, pwd)
# get result
ldap_result_id = connection.search_s(basedn, searchScope, searchFilter, searchAttribute)
# extract the id
saMAccount = ldap_result_id[0][1]["sAMAccountName"][0].decode('utf-8')
except ldap.INVALID_CREDENTIALS:
print("Your username or password is incorrect.")
except ldap.LDAPError as e:
print(e)
except:
print("Data doesn't exist for this user")
connection.unbind_s()
print(get_user_id("user1#mygreatcompany.COM"))