De-/serialize Python dataclasses to or from JSON payloads. Compatible with Python 3.7 and newer.
Project description
databind.json
The databind.json
package implements the de-/serialization to or from JSON payloads using
the databind.core
framework.
Check out the Documentation for examples.
Built-in converters
The following tables shows which types can be deserialized from / serialize to Python types with the native
converters provided by the databind.json
module:
Converter name | Types | Description |
---|---|---|
AnyConverter |
typing.Any |
Accept any value (useful for arbitrary JSON). |
CollectionConverter |
typing.Collection[T] , excl. str , bytes , bytearray , memoryview and typing.Mapping[K, V] |
Converts between native Python collections and JSON arrays. |
DatetimeConverter |
datetime.date , datetime.datetime , datetime.time |
Converts between strings and date/time formats, using ISO 8601 time format by default (can be changed with the databind.core.settings.DateFormat setting). |
DecimalConverter |
decimal.Decimal |
Converts between strings (and ints/floats if strict mode is off, strict mode is on by default) and decimals. The precision can be controlled with the databind.core.settings.Precision setting. |
EnumConverter |
enum.Enum , enum.IntEnum |
Convert between strings and Python enumerations. The serialized form of IntEnum is the integer value, whereas the serialized form of Enum is a string (name of the enumeration value). |
MappingConverter |
typing.Mapping[K, V] |
Converts between Python dicts and JSON objects. (While in theory K can be any type, for JSON K always needs to be str ). |
OptionalConverter |
typing.Optional[T] |
Handles optional fields in a schema. |
PlainDatatypeConverter |
bytes , str , int , float , bool |
Converts between plain datatypes. In non-strict mode (off by default), numeric types will also accept strings as input for the deserialization. |
SchemaConverter |
dataclasses.dataclass , typing.TypedDict |
Converts between Python dataclasses or typed dictionary and JSON objects. |
UnionConverter |
typing.Union[...] |
Handles union types. Unions in JSON can be expressed in a multitide of ways, e.g. using a discriminator key and flat, keyed or nested structure or "best match". Check out the examples section of the documentation for more information. |
LiteralConverter |
typing.Literal[...] |
Accepts or rejects a value based on whether it matches one of the values in the literal type hint. |
The following converters are provided for convenience:
Converter name | Types | Description |
---|---|---|
StringifyConverter |
n/a | A helper that allows to easily create de/serializers from a "to string" and "from string" function. |
The following additional types are natively supported by databind.json
using StringifyConverter
:
Types | Description |
---|---|
uuid.UUID |
Convert between strings and UUIDs. |
pathlib.Path |
Convert between strings and paths. |
pathlib.PurePath |
Convert between strings and paths. |
nr.date.duration |
Deserialize from ISO 8601 duration strings or the object form, serialize to ISO 8601 strings. |
Copyright © 2020 – Niklas Rosenstein
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