Fix stuff and add support for Sequence

HISTORY.rst

@@ -2,6 +2,22 @@
 History
 =======
 
+0.32.0 (2024-11-30)
+-------------------
+
+**Features and Improvements**
+
+- Add support for ``Sequence`` and ``MutableSequence``
+
+**Bugfixes**
+
+* Fix a bug in ``ParseError``
+* Fix issue when field in ``EnvWizard`` is a dataclass, and
+  instance of that type is passed to constructor
+* Fix some logic in ``parsers.py`` that was relying on all parsers
+  being subclass of :class:`AbstractParser`, as they can now be a function
+  instead.
+
 0.31.0 (2024-11-30)
 -------------------
 

dataclass_wizard/errors.py

@@ -145,7 +145,6 @@ def message(self) -> str:
             obj_type=self.name(self.obj_type))
 
         if self.json_object:
-            self.kwargs['json_object'] = json.dumps(self.json_object, default=str)
             from .utils.json_util import safe_dumps
             self.kwargs['json_object'] = safe_dumps(self.json_object)
 
@@ -297,7 +296,6 @@ def message(self) -> str:
 
         msg = self._TEMPLATE.format(
             cls=self.class_name,
-            # json_string=json.dumps(self.obj, default=str),
             json_string=safe_dumps(self.obj),
             fields=self.fields,
             json_key=self.json_key)
@@ -335,7 +333,6 @@ def message(self) -> str:
         msg = self._TEMPLATE.format(
             cls=self.class_name,
             nested_cls=self.nested_class_name,
-            # json_string=json.dumps(self.obj, default=str),
             json_string=safe_dumps(self.obj),
             field=self.field_name,
             o=self.obj,

dataclass_wizard/loaders.py

@@ -10,6 +10,8 @@
     NamedTupleMeta,
     SupportsFloat, AnyStr, Text, Callable, Optional
 )
+from collections.abc import Sequence as ABCSequence, MutableSequence as ABCMutableSequence
+
 from uuid import UUID
 
 from .abstractions import AbstractLoader, AbstractParser
@@ -438,6 +440,18 @@ def get_parser_for_annotation(cls, ann_type: Type[T],
                         cls.get_parser_for_annotation
                     )
 
+                elif base_type in (ABCSequence, ABCMutableSequence):
+
+                    load_hook = cls.load_to_iterable
+                    # Re-map to list, e.g. `Sequence[int]` -> `list[int]`
+                    ann_type = list[ann_type] if (
+                        ann_type := get_args(ann_type)[0]) else list
+
+                    return IterableParser(
+                        base_cls, extras, ann_type, load_hook,
+                        cls.get_parser_for_annotation
+                    )
+
                 else:
                     load_hook = hooks.get(base_type)
 

dataclass_wizard/parsers.py

@@ -364,7 +364,8 @@ class TupleParser(AbstractParser[Type[S], S]):
     __slots__ = ('hook',
                  'elem_parsers',
                  'total_count',
-                 'required_count')
+                 'required_count',
+                 'elem_types')
 
     # Base type of the object which is instantiable
     #   ex. `Tuple[bool, int]` -> `tuple`
@@ -378,7 +379,7 @@ def __post_init__(self, cls: Type,
 
         # Get the subscripted values
         #   ex. `Tuple[bool, int]` -> (bool, int)
-        elem_types = get_args(self.base_type)
+        self.elem_types = elem_types = get_args(self.base_type)
         self.base_type = get_origin(self.base_type)
         # A collection with a parser for each type argument
         elem_parsers = tuple(get_parser(t, cls, extras)
@@ -391,7 +392,8 @@ def __post_init__(self, cls: Type,
         #   this should exclude the parsers for `Optional` or `Union` types
         #   that have `None` in the list of args.
         self.required_count: int = len(tuple(p for p in elem_parsers
-                                             if None not in p))
+                                             if not isinstance(p, AbstractParser)
+                                             or None not in p))
 
         self.elem_parsers = elem_parsers or None
 
@@ -410,8 +412,9 @@ def __call__(self, o: S) -> S:
                 desired_count = str(self.total_count)
 
             # self.elem_parsers can be None at this moment
-            elem_parsers_types = [p.base_type for p in self.elem_parsers] \
-                if self.elem_parsers else []
+            elem_parsers_types = [getattr(p, 'base_type', tp) for p, tp in
+                                  zip(self.elem_parsers, self.elem_types)] \
+                if self.elem_parsers else self.elem_types
 
             raise ParseError(
                 e, o, elem_parsers_types,