biometrics_tracker.model.json_handler module

• Index

class biometrics_tracker.model.json_handler.BiometricsJSONEncoder(*, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, sort_keys=False, indent=None, separators=None, default=None)

Bases: JSONEncoder

Implements a custom json.JSONEncoder to encode instances of model.BodyWeight, model.Pulse, etc. The result will be stored in the data property of an instance of one the classes that extend model.DataPoint. The purpose of this encoding is to allow the various types of readings to be stored in a single SQL table, rather than requiring a table for each type of reading

Parameters

obj (Any) – the object to be converted to JSON format

default(obj: Any)

Implement this method in a subclass such that it returns a serializable object for o, or calls the base implementation (to raise a TypeError).

For example, to support arbitrary iterators, you could implement default like this:

def default(self, o):
    try:
        iterable = iter(o)
    except TypeError:
        pass
    else:
        return list(iterable)
    # Let the base class default method raise the TypeError
    return JSONEncoder.default(self, o)

biometrics_tracker.model.json_handler.biometrics_object_hook(obj_dict: dict)

A custom object hook function to handle the decoding of JSON representations of model.BodyWeight, model.Pulse, etc. instances

Parameters

obj_dict (dict[str, str]) – a dict containing JSON names and values

Returns

an instance of the appropriate class (e.g. biometrics_tracker.model.BodyWeight, model.Pulse)

Return type

biometrics_tracker.model.datapoints.dp_type_union