app/extract_identity_number/doc_number_extractor.py

import re

def doc_number(ocr_list):
    try:

        for item in ocr_list:
            if (len(item) >= 6 and item[0].isnumeric() ) or (len(item) >= 6 and (item[0].isalpha() and item[1].isnumeric())):
                print("DOCUMENT NUMBRE IS : ", item)
                return True, item, ocr_list    
        return False, None, ocr_list
    except Exception as e:
        print("Exception in doc_number : " ,str(e))
        return False, None, ocr_list