🎨 Update type annotations, fix mypy errors

sqlmodel/main.py

@@ -6,7 +6,6 @@
 from enum import Enum
 from pathlib import Path
 from typing import (
-    TYPE_CHECKING,
     AbstractSet,
     Any,
     Callable,
@@ -24,11 +23,11 @@
     cast,
 )
 
-from pydantic import BaseModel
+from pydantic import BaseConfig, BaseModel
 from pydantic.errors import ConfigError, DictError
 from pydantic.fields import FieldInfo as PydanticFieldInfo
 from pydantic.fields import ModelField, Undefined, UndefinedType
-from pydantic.main import BaseConfig, ModelMetaclass, validate_model
+from pydantic.main import ModelMetaclass, validate_model
 from pydantic.typing import ForwardRef, NoArgAnyCallable, resolve_annotations
 from pydantic.utils import ROOT_KEY, Representation
 from sqlalchemy import (
@@ -453,7 +452,7 @@ def get_column_from_field(field: ModelField) -> Column:  # type: ignore
     sa_column_kwargs = getattr(field.field_info, "sa_column_kwargs", Undefined)
     if sa_column_kwargs is not Undefined:
         kwargs.update(cast(Dict[Any, Any], sa_column_kwargs))
-    return Column(sa_type, *args, **kwargs)
+    return Column(sa_type, *args, **kwargs)  # type: ignore
 
 
 class_registry = weakref.WeakValueDictionary()  # type: ignore
@@ -494,9 +493,6 @@ def __new__(cls, *args: Any, **kwargs: Any) -> Any:
     def __init__(__pydantic_self__, **data: Any) -> None:
         # Uses something other than `self` the first arg to allow "self" as a
         # settable attribute
-        if TYPE_CHECKING:
-            __pydantic_self__.__dict__: Dict[str, Any] = {}
-            __pydantic_self__.__fields_set__: Set[str] = set()
         values, fields_set, validation_error = validate_model(
             __pydantic_self__.__class__, data
         )
@@ -608,7 +604,7 @@ def validate(cls: Type["SQLModel"], value: Any) -> "SQLModel":
             return cls(**value_as_dict)
 
     # From Pydantic, override to only show keys from fields, omit SQLAlchemy attributes
-    def _calculate_keys(  # type: ignore
+    def _calculate_keys(
         self,
         include: Optional[Mapping[Union[int, str], Any]],
         exclude: Optional[Mapping[Union[int, str], Any]],