How to convert COBOL statement into dynamic Json Structure using Python

#Example COBOL statement 
cobol_statement = "MODIFY MAP CURSOR AT NBS-DS-01(1) FOR FIELD (NBS-DS-01, NBS-DS-02(2), NBS-DS-03(3))"

I need a json structure to covert this COBOL i need a result as

{"cursor": "NBS-DS-01(1)", "for": ["NBS-DS-01","NBS-DS-02(2)","NBS-DS-03(3)"]}

I need the json structure to be dynamic whatever the field I’am adding to be convert automatically

>Solution :

You can try this regular expression. If you use a different format you need to reconstruct the regex.

import re
import json

def cobol_to_json(statement):
    pattern = r"MODIFY MAP CURSOR AT ([\w-]+\(\d+\)) FOR FIELD \(([\w-]+(?:\(\d+\))?(?:, [\w-]+(?:\(\d+\))?)*)\)"
    match = re.match(pattern, statement)
    if match:
        cursor = match.group(1)
        fields_str = match.group(2)
        fields = [field.strip() for field in fields_str.split(',')]
        result = {
            "cursor": cursor,
            "for": fields
        }
        return json.dumps(result, indent=4)
    else:
        return "invalid statement"


statement = "MODIFY MAP CURSOR AT NBS-DS-01(1) FOR FIELD (NBS-DS-01, NBS-DS-02(2), NBS-DS-03(3))"
result = cobol_to_json(statement)
print(result)

Output:

{
    "cursor": "NBS-DS-01(1)",
    "for": [
        "NBS-DS-01",
        "NBS-DS-02(2)",
        "NBS-DS-03(3)"
    ]
}