Python: Allow JSON serialize to work over datetime data type

json-date-time-serailizer.py

def to_serializable(val):
    """
    Allows the JSON serializer to work over datetime data type
    :param val:
    :return:
    """
    if isinstance(val, datetime):
        return val.isoformat() + "Z"

    vf = type(val).__name__
    if vf == "ObjectId":
        return str(val)

    # This is the key importance for this to work for other types of data
    return val.__dict__
  
  # THEN at some point in the code you would pass _to_serializable to json.dump, in this case
  # "score" is a Plain Python Class, the object can also be a Ptyhon dict type
  
   try:
            with open(ehr_path, 'w') as ehr_file:
                json.dump(score, ehr_file, indent=3, default=to_serializable)
        except Exception as why:
            log.warning(f"ehr record for {ehr_path} save failed due to {why}")