[Typing][A-54,A-55,A-56] Add type annotations for `paddle/nn/function…

…al/{activation.py, common.py, conv.py}` (PaddlePaddle#65191)


---------

Co-authored-by: SigureMo <sigure.qaq@gmail.com>

python/paddle/_typing/basic.py

@@ -13,7 +13,16 @@
 # limitations under the License.
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, List, Sequence, Tuple, TypeVar, Union
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    List,
+    Literal,
+    Sequence,
+    Tuple,
+    TypeVar,
+    Union,
+)
 
 import numpy as np
 import numpy.typing as npt
@@ -44,3 +53,5 @@
 NumbericSequence = Sequence[Numberic]
 NestedNumbericSequence: TypeAlias = NestedSequence[Numberic]
 TensorOrTensors: TypeAlias = Union["Tensor", Sequence["Tensor"]]
+
+PaddingMode: TypeAlias = Literal['valid', 'same', 'VALID', 'SAME']

python/paddle/_typing/layout.py

@@ -20,7 +20,7 @@
 # Note: Do not confrom to predefined naming style in pylint.
 DataLayout0D: TypeAlias = Literal["NC"]
 DataLayout1D: TypeAlias = Literal["NCL", "NLC"]
-DataLayout2D: TypeAlias = Literal["NCHW", "NHCW"]
+DataLayout2D: TypeAlias = Literal["NCHW", "NHWC"]
 DataLayout3D: TypeAlias = Literal["NCDHW", "NDHWC"]
 
 DataLayoutND: TypeAlias = Union[