!47578 add api doc for mindspore.QuantDtype

Merge pull request !47578 from hangq/wood

docs/api/api_python/mindspore.rst

@@ -36,6 +36,7 @@ mindspore
     mindspore.dtype_to_pytype
     mindspore.pytype_to_dtype
     mindspore.get_py_obj_dtype
+    mindspore.QuantDtype
 
 运行环境
 ---------

docs/api/api_python/mindspore/mindspore.QuantDtype.rst

@@ -0,0 +1,19 @@
+mindspore.QuantDtype
+====================
+
+.. py:class:: mindspore.QuantDtype
+
+    MindSpore量化数据类型枚举类，包含 `INT1` ~ `INT16`，`UINT1` ~ `UINT16` 。
+
+    `QuantDtype` 定义在 `/mindspore/common/dtype.py` 文件下 。运行以下命令导入环境：
+
+    .. code-block::
+
+        from mindspore import QuantDtype
+
+    .. py:method:: value(self)
+
+        获取当前 `QuantDtype` 的值。
+
+        返回：
+            int，表示当前 `QuantDtype` 的值。

docs/api/api_python_en/mindspore.rst

@@ -143,6 +143,7 @@ DataType
     mindspore.dtype_to_pytype
     mindspore.pytype_to_dtype
     mindspore.get_py_obj_dtype
+    mindspore.QuantDtype
 
 Context
 --------

mindspore/python/mindspore/common/__init__.py

@@ -21,7 +21,7 @@ from mindspore.common.dtype import Type, int8, byte, int16, short, int32, intc,
     float32, single, float64, double, bool_, float_, list_, tuple_, int_, \
     uint, number, tensor, string, type_none, tensor_type, Int, \
     complex64, complex128, dtype_to_nptype, _null, _null_type, \
-    dtype_to_pytype, pytype_to_dtype, get_py_obj_dtype
+    dtype_to_pytype, pytype_to_dtype, get_py_obj_dtype, QuantDtype
 from mindspore.common.dump import set_dump
 from mindspore.common.parameter import Parameter, ParameterTuple
 from mindspore.common.seed import set_seed, get_seed
@@ -50,7 +50,7 @@ __all__ = [
     "number", "tensor",
     "string", "type_none",
     "_null",
-    "tensor_type",
+    "tensor_type", "QuantDtype",
     "Type", "Int", "_null_type",
     "complex64", "complex128",
     # __method__ from dtype