version: 1

dn: cn=demo1,ou=groups,dc=example,dc=com
changetype: add
objectClass: groupOfNames
objectClass: nsMemberOf
objectClass: posixGroup
objectClass: top
cn: demo1
gidNumber: 99997


dn: cn=demo2,ou=groups,dc=example,dc=com
changetype: add
objectClass: groupOfNames
objectClass: nsMemberOf
objectClass: posixGroup
objectClass: top
cn: demo2
gidNumber: 99996


dn: cn=demo2,ou=groups,dc=example,dc=com
changetype: modify
add: description
description: Eine zweite Testgruppe


dn: cn=demo1,ou=groups,dc=example,dc=com
changetype: delete

from pathlib import Path
from ldif import LDIFParser

class MyLDIFParser(LDIFParser):
    
    def __init__(self, input_file, ignored_attr_types=None, max_entries=0, process_url_schemes=None, line_sep='\n'):
        super().__init__(input_file, ignored_attr_types, max_entries, process_url_schemes, line_sep)

    def handle(self, dn, entry):
        print(f"MyLDIFParser::handle({dn})")
    
    def handle_modify(self, dn, modops, controls=None):
        print(f"MyLDIFParser::handle_modify({dn})")

def main():
    p_change = Path("test_change.ldif")
    ldifparser_change = MyLDIFParser(open(p_change), "r")
    ldifparser_change.parse_change_records()
    print(f"Changetype counter: {ldifparser_change.changetype_counter}")
    
    

if __name__ == '__main__':
    main()

$ ./demo.py 
MyLDIFParser::handle_modify(cn=demo2,ou=groups,dc=example,dc=com)
Changetype counter: {'add': 2, 'delete': 1, 'modify': 1, 'modrdn': 0}