Marshmallow

++++++++++++++++++++

Features:

- *Backwards-incompatible*: Schemas are always strict (:issue:`377`).
The ``strict`` parameter is removed.
- *Backwards-incompatible*: ``Schema().load`` and ``Schema().dump`` return ``data`` instead of a
``(data, errors)`` tuple (:issue:`598`).
- *Backwards-incomaptible*: ``Schema().load(None)`` raises a
``ValidationError`` (:issue:`511`).

See :ref:`upgrading_3_0` for a guide on updating your code.

Thanks :user:`lafrech` for implementing these changes.
Special thanks to :user:`MichalKononenko`, :user:`douglas-treadwell`, and
:user:`maximkulkin` for the discussions on these changes.


Other changes:

- *Backwards-incompatible*: Field name is not checked when ``load_from``
is specified (:pr:`714`). Thanks :user:`lafrech`.

Support:

- Add `Code of Conduct <https://marshmallow.readthedocs.io/en/dev/code_of_conduct.html>`_.

++++++++++++++++++++

Bug fixes:

- Fixes ``ValidationError.valid_data`` when a nested field contains errors
(:issue:`710`). This bug was introduced in 3.0.0b3. Thanks
:user:`lafrech`.

Other changes:

- *Backwards-incompatible*: ``Email`` and ``URL`` fields don't validate
on serialization (:issue:`608`). This makes them more consistent with the other
fields and improves serialization performance. Thanks again :user:`lafrech`.
- ``validate.URL`` requires square brackets around IPv6 URLs (:issue:`707`). Thanks :user:`harlov`.

++++++++++++++++++++

Features:

- Add support for structured dictionaries by providing values and keys arguments to the
``Dict`` field's constructor. This mirrors the ``List``
field's ability to validate its items (:issue:`483`). Thanks :user:`deckar01`.

Other changes:

- *Backwards-incompatible*: ``utils.from_iso`` is deprecated in favor of
``utils.from_iso_datetime`` (:issue:`694`). Thanks :user:`sklarsa`.

++++++++++++++++++++

Features:

- Add support for millisecond, minute, hour, and week precisions to
``fields.TimeDelta`` (:issue:`537`). Thanks :user:`Fedalto` for the
suggestion and the PR.
- Includes features from release 2.14.0.


Support:

- Copyright year in docs uses ``CHANGELOG.rst``'s modified date for
reproducible builds (:issue:`679`). Thanks :user:`bmwiedemann`.
- Test against Python 3.6 in tox. Thanks :user:`Fedalto`.
- Fix typo in exception message (:issue:`659`). Thanks :user:`wonderbeyond`
for reporting and thanks :user:`yoichi` for the PR.

++++++++++++++++++++

Features:

- Add ``valid_data`` attribute to ``ValidationError``.
- Add ``strict`` parameter to ``Integer`` (:issue:`667`). Thanks
:user:`yoichi`.

Deprecations/Removals:

- Deprecate ``json_module`` option in favor of ``render_module`` (:issue:`364`, :issue:`130`). Thanks :user:`justanr` for the suggestion.

Bug fixes:

- Includes bug fixes from releases 2.13.5 and 2.13.6.
- *Backwards-incompatible*: ``Number`` fields don't accept booleans as valid input (:issue:`623`). Thanks :user:`tuukkamustonen` for the suggestion and thanks :user:`rowillia` for the PR.

Support:

- Add benchmark script. Thanks :user:`rowillia`.

++++++++++++++++++++

Features:

- Add ``truthy`` and ``falsy`` params to ``fields.Boolean`` (:issue:`580`). Thanks :user:`zwack` for the PR. Note: This is potentially a breaking change if your code passes the `default` parameter positionally. Pass `default` as a keyword argument instead, e.g. ``fields.Boolean(default=True)``.

Other changes:

- *Backwards-incompatible*: ``validate.ContainsOnly`` allows empty and duplicate values (:issue:`516`, :issue:`603`). Thanks :user:`maximkulkin` for the suggestion and thanks :user:`lafrech` for the PR.

Bug fixes:

- Includes bug fixes from release 2.13.4.