def search_subschemasubentry_s(self,dn=''):
    """
    Returns the distinguished name of the sub schema sub entry
    for a part of a DIT specified by dn.

    None as result indicates that the DN of the sub schema sub entry could
    not be determined.
    """
    try:
      r = self.search_s(
        dn,ldap.SCOPE_BASE,'(objectClass=*)',['subschemaSubentry']
      )
    except (ldap.NO_SUCH_OBJECT,ldap.NO_SUCH_ATTRIBUTE,ldap.INSUFFICIENT_ACCESS):
      r = []
    except ldap.UNDEFINED_TYPE:
      return None
    try:
      if r:
        e = ldap.cidict.cidict(r[0][1])
        search_subschemasubentry_dn = e.get('subschemaSubentry',[None])[0]
        if search_subschemasubentry_dn is None:
          if dn:
            # Try to find sub schema sub entry in root DSE
            return self.search_subschemasubentry_s(dn='')
          else:
            # If dn was already root DSE we can return here
            return None
        else:
          return search_subschemasubentry_dn
    except __HOLE__:
      return None
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/python-ldap-2.3.13/Lib/ldap/ldapobject.py/SimpleLDAPObject.search_subschemasubentry_s