✨ Add param functions, to override types, to make mypy happy (#226)

fastapi/__init__.py

@@ -7,5 +7,15 @@ from starlette.background import BackgroundTasks
 from .applications import FastAPI
 from .datastructures import UploadFile
 from .exceptions import HTTPException
-from .params import Body, Cookie, Depends, File, Form, Header, Path, Query, Security
+from .param_functions import (
+    Body,
+    Cookie,
+    Depends,
+    File,
+    Form,
+    Header,
+    Path,
+    Query,
+    Security,
+)
 from .routing import APIRouter

fastapi/dependencies/utils.py

@@ -66,7 +66,7 @@ def get_sub_dependant(
         dependency_scopes = depends.scopes
         security_scopes.extend(dependency_scopes)
     if isinstance(dependency, SecurityBase):
-        use_scopes = []
+        use_scopes: List[str] = []
         if isinstance(dependency, (OAuth2, OpenIdConnect)):
             use_scopes = security_scopes
         security_requirement = SecurityRequirement(

fastapi/param_functions.py

@@ -0,0 +1,248 @@
+from typing import Any, Callable, Sequence
+
+from fastapi import params
+
+
+def Path(  # noqa: N802
+    default: Any,
+    *,
+    alias: str = None,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    deprecated: bool = None,
+    **extra: Any,
+) -> Any:
+    return params.Path(
+        default=default,
+        alias=alias,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        deprecated=deprecated,
+        **extra,
+    )
+
+
+def Query(  # noqa: N802
+    default: Any,
+    *,
+    alias: str = None,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    deprecated: bool = None,
+    **extra: Any,
+) -> Any:
+    return params.Query(
+        default,
+        alias=alias,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        deprecated=deprecated,
+        **extra,
+    )
+
+
+def Header(  # noqa: N802
+    default: Any,
+    *,
+    alias: str = None,
+    convert_underscores: bool = True,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    deprecated: bool = None,
+    **extra: Any,
+) -> Any:
+    return params.Header(
+        default,
+        alias=alias,
+        convert_underscores=convert_underscores,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        deprecated=deprecated,
+        **extra,
+    )
+
+
+def Cookie(  # noqa: N802
+    default: Any,
+    *,
+    alias: str = None,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    deprecated: bool = None,
+    **extra: Any,
+) -> Any:
+    return params.Cookie(
+        default,
+        alias=alias,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        deprecated=deprecated,
+        **extra,
+    )
+
+
+def Body(  # noqa: N802
+    default: Any,
+    *,
+    embed: bool = False,
+    media_type: str = "application/json",
+    alias: str = None,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    **extra: Any,
+) -> Any:
+    return params.Body(
+        default,
+        embed=embed,
+        media_type=media_type,
+        alias=alias,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        **extra,
+    )
+
+
+def Form(  # noqa: N802
+    default: Any,
+    *,
+    media_type: str = "application/x-www-form-urlencoded",
+    alias: str = None,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    **extra: Any,
+) -> Any:
+    return params.Form(
+        default,
+        media_type=media_type,
+        alias=alias,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        **extra,
+    )
+
+
+def File(  # noqa: N802
+    default: Any,
+    *,
+    media_type: str = "multipart/form-data",
+    alias: str = None,
+    title: str = None,
+    description: str = None,
+    gt: float = None,
+    ge: float = None,
+    lt: float = None,
+    le: float = None,
+    min_length: int = None,
+    max_length: int = None,
+    regex: str = None,
+    **extra: Any,
+) -> Any:
+    return params.File(
+        default,
+        media_type=media_type,
+        alias=alias,
+        title=title,
+        description=description,
+        gt=gt,
+        ge=ge,
+        lt=lt,
+        le=le,
+        min_length=min_length,
+        max_length=max_length,
+        regex=regex,
+        **extra,
+    )
+
+
+def Depends(dependency: Callable = None) -> Any:  # noqa: N802
+    return params.Depends(dependency=dependency)
+
+
+def Security(  # noqa: N802
+    dependency: Callable = None, scopes: Sequence[str] = None
+) -> Any:
+    return params.Security(dependency=dependency, scopes=scopes)