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CHANGELOG.rst

@@ -395,6 +395,7 @@ Deprecations:
 
     from marshmallow import Schema, fields
 
+
     # <3.3
     class PersonSchema(Schema):
         partner = fields.Nested("self", exclude=("partner",))

docs/custom_fields.rst

@@ -155,7 +155,6 @@ Error messages can also be passed to a `Field's` constructor.
 
 
     class UserSchema(Schema):
-
         name = fields.Str(
             required=True, error_messages={"required": "Please provide a name."}
         )

docs/extending.rst

@@ -183,6 +183,7 @@ The pipeline for serialization is similar, except that the ``pass_many=True`` pr
 
         from marshmallow import Schema, fields, pre_load
 
+
         # YES
         class MySchema(Schema):
             field_a = fields.Field()

docs/upgrading.rst

@@ -13,6 +13,7 @@ Use this to resolve order-of-declaration issues when schemas nest each other.
 
     from marshmallow import Schema, fields
 
+
     # <3.3
     class AlbumSchema(Schema):
         title = fields.Str()
@@ -41,6 +42,7 @@ Passing ``"self"`` is deprecated.
 
     from marshmallow import Schema, fields
 
+
     # <3.3
     class PersonSchema(Schema):
         partner = fields.Nested("self", exclude=("partner",))
@@ -377,6 +379,7 @@ If your `Schema <marshmallow.Schema>` overrides `get_attribute <marshmallow.Sche
 
     from marshmallow import Schema
 
+
     # 2.x
     class MySchema(Schema):
         def get_attribute(self, attr, obj, default):
@@ -458,6 +461,7 @@ The `Method <marshmallow.fields.Method>` and `Function <marshmallow.fields.Funct
 
     from marshmallow import Schema, fields, missing
 
+
     # 2.x
     class ShapeSchema(Schema):
         area = fields.Method("get_area")
@@ -498,6 +502,7 @@ Use a `post_dump <marshmallow.decorators.post_dump>` to add additional data on s
 
     from marshmallow import Schema, fields, post_dump
 
+
     # 2.x
     class MySchema(Schema):
         x = fields.Int()
@@ -508,6 +513,7 @@ Use a `post_dump <marshmallow.decorators.post_dump>` to add additional data on s
     schema.dump({"x": 1, "y": 2})
     # => {'z': 123, 'y': 2, 'x': 1}
 
+
     # 3.x
     class MySchema(Schema):
         x = fields.Int()
@@ -587,6 +593,7 @@ Subclasses of `SchemaOpts <marshmallow.SchemaOpts>` receive an additional argume
 
     from marshmallow import SchemaOpts
 
+
     # 2.x
     class CustomOpts(SchemaOpts):
         def __init__(self, meta):
@@ -661,6 +668,7 @@ The ``json_module`` class Meta option is deprecated in favor of ``render_module`
 
     import ujson
 
+
     # 2.x
     class MySchema(Schema):
         class Meta:
@@ -737,6 +745,7 @@ This use case is covered by using two different `Schema`.
 
     from marshmallow import Schema, fields
 
+
     # 2.x
     class UserSchema(Schema):
         id = fields.Str()
@@ -867,6 +876,7 @@ In marshmallow 2.x, ``Float`` field would serialize and deserialize special valu
     MySchema().load({"x": "nan"})
     # => {{'x': nan}}
 
+
     # 3.x
     class MySchema(Schema):
         x = fields.Float()
@@ -899,6 +909,7 @@ The ``Meta`` option ``dateformat`` used to pass format to `DateTime <marshmallow
     MySchema().dump({"x": dt.datetime(2017, 9, 19)})
     # => {{'x': '2017-09'}}
 
+
     # 3.x
     class MySchema(Schema):
         x = fields.DateTime()
@@ -936,6 +947,7 @@ The ``Meta`` option ``dateformat`` used to pass format to `DateTime <marshmallow
     )
     # => {{'x': '2017-09-19T00:00:00+00:00', 'y': '2017-09-18T22:00:00+00:00', 'z': '2017-09-19T00:00:00+02:00'}}
 
+
     # 3.x
     class MySchema(Schema):
         x = fields.DateTime()
@@ -967,6 +979,7 @@ The ``prefix`` parameter of ``Schema`` is removed. The same feature can be achie
     MySchema(prefix="pre_").dump({"f1": "one", "f2": "two"})
     # {'pre_f1': 'one', '_pre_f2': 'two'}
 
+
     # 3.x
     class MySchema(Schema):
         f1 = fields.Field()
@@ -1023,6 +1036,7 @@ In marshmallow 2, it was possible to have multiple fields with the same ``attrib
     MySchema()
     #  No error
 
+
     # 3.x
     class MySchema(Schema):
         f1 = fields.Field()
@@ -1058,6 +1072,7 @@ re-raise exceptions using ``raise ... from ...``.
     from marshmallow import fields, ValidationError
     from packaging import version
 
+
     # 2.x
     class Version(fields.Field):
         default_error_messages = {"invalid": "Not a valid version."}
@@ -1101,6 +1116,7 @@ should accept ``**kwargs``:
     from marshmallow import fields, ValidationError
     from packaging import version
 
+
     # 2.x
     class MyCustomField(fields.Field):
         def _deserialize(self, value, attr, obj):
@@ -1318,6 +1334,7 @@ Custom accessors and error handlers are now defined as methods. `Schema.accessor
 
     from marshmallow import Schema, fields
 
+
     # 1.0 Deprecated API
     class ExampleSchema(Schema):
         field_a = fields.Int()
@@ -1472,6 +1489,7 @@ Two changes must be made to make your custom fields compatible with version 2.0.
     from marshmallow import fields, ValidationError
     from marshmallow.exceptions import UnmarshallingError
 
+
     # In 1.0, an UnmarshallingError was raised
     class PasswordField(fields.Field):
         def _deserialize(self, val):