add missing files throughout the codebase (#102)

django-stubs/forms/fields.pyi

@@ -1,12 +1,16 @@
 from datetime import datetime, timedelta
 from decimal import Decimal
-from typing import Any, Callable, List, Optional, Pattern, Sequence, Type, Union
+from typing import Any, Callable, List, Optional, Pattern, Sequence, Type, Union, Tuple, Iterable
 
 from django.core.validators import BaseValidator
 from django.forms.boundfield import BoundField
 from django.forms.forms import BaseForm
 from django.forms.widgets import Widget
 
+_Choice = Tuple[Any, str]
+_ChoiceNamedGroup = Tuple[str, Iterable[_Choice]]
+_FieldChoices = Iterable[Union[_Choice, _ChoiceNamedGroup]]
+
 class Field:
     initial: Any
     label: Optional[str]
@@ -23,6 +27,9 @@ class Field:
     localize: bool = ...
     error_messages: Any = ...
     validators: List[BaseValidator] = ...
+    max_length: Optional[Union[int, str]] = ...
+    choices: _FieldChoices = ...
+    base_field: Field
     def __init__(
         self,
         *,
@@ -47,9 +54,9 @@ class Field:
     def widget_attrs(self, widget: Widget) -> Any: ...
     def has_changed(self, initial: Any, data: Any) -> bool: ...
     def get_bound_field(self, form: BaseForm, field_name: str) -> BoundField: ...
+    def deconstruct(self) -> Any: ...
 
 class CharField(Field):
-    max_length: Optional[Union[int, str]] = ...
     min_length: Optional[Union[int, str]] = ...
     strip: bool = ...
     empty_value: Optional[str] = ...
@@ -171,7 +178,6 @@ class RegexField(CharField):
 class EmailField(CharField): ...
 
 class FileField(Field):
-    max_length: Optional[int] = ...
     allow_empty_file: bool = ...
     def __init__(
         self,

django-stubs/forms/forms.pyi

@@ -1,9 +1,6 @@
-from datetime import datetime
 from typing import Any, Dict, Iterator, List, Mapping, Optional, Sequence, Type, Union
 
 from django.core.exceptions import ValidationError as ValidationError
-from django.core.files.uploadedfile import SimpleUploadedFile
-from django.db.models.query import QuerySet
 from django.forms.boundfield import BoundField
 from django.forms.fields import Field
 from django.forms.renderers import BaseRenderer