{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# dtype\n",
    "\n",
    "[![](https://gitee.com/mindspore/docs/raw/r1.2/docs/programming_guide/source_zh_cn/_static/logo_source.png)](https://gitee.com/mindspore/docs/blob/r1.2/docs/programming_guide/source_zh_cn/dtype.ipynb) [![](https://gitee.com/mindspore/docs/raw/r1.2/docs/programming_guide/source_zh_cn/_static/logo_notebook.png)](https://obs.dualstack.cn-north-4.myhuaweicloud.com/mindspore-website/notebook/r1.2/programming_guide/mindspore_dtype.ipynb) [![](https://gitee.com/mindspore/docs/raw/r1.2/docs/programming_guide/source_zh_cn/_static/logo_modelarts.png)](https://console.huaweicloud.com/modelarts/?region=cn-north-4#/notebook/loading?share-url-b64=aHR0cHM6Ly9vYnMuZHVhbHN0YWNrLmNuLW5vcnRoLTQubXlodWF3ZWljbG91ZC5jb20vbWluZHNwb3JlLXdlYnNpdGUvbm90ZWJvb2svbW9kZWxhcnRzL3Byb2dyYW1taW5nX2d1aWRlL21pbmRzcG9yZV9kdHlwZS5pcHluYg==&image_id=65f636a0-56cf-49df-b941-7d2a07ba8c8c)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 概述\n",
    "\n",
    "MindSpore张量支持不同的数据类型，包含`int8`、`int16`、`int32`、`int64`、`uint8`、`uint16`、`uint32`、`uint64`、`float16`、`float32`、`float64`、`bool_`，与NumPy的数据类型一一对应。\n",
    "\n",
    "在MindSpore的运算处理流程中，Python中的`int`数会被转换为定义的`int64`类型，`float`数会被转换为定义的`float32`类型。\n",
    "\n",
    "详细的类型支持情况请参考：<https://www.mindspore.cn/doc/api_python/zh-CN/r1.2/mindspore/mindspore.html#mindspore.dtype>。\n",
    "\n",
    "以下代码，打印MindSpore的数据类型int32。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Int32\n"
     ]
    }
   ],
   "source": [
    "from mindspore import dtype as mstype\n",
    "\n",
    "data_type = mstype.int32\n",
    "print(data_type)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 数据类型转换接口\n",
    "\n",
    "MindSpore提供了以下几个接口，实现与NumPy数据类型和Python内置的数据类型间的转换。\n",
    "\n",
    "- `dtype_to_nptype`：将MindSpore的数据类型转换为NumPy对应的数据类型。\n",
    "\n",
    "- `dtype_to_pytype`：将MindSpore的数据类型转换为Python对应的内置数据类型。\n",
    "\n",
    "- `pytype_to_dtype`：将Python内置的数据类型转换为MindSpore对应的数据类型。\n",
    "\n",
    "以下代码实现了不同数据类型间的转换，并打印转换后的类型。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'numpy.int32'>\n",
      "Int64\n",
      "<class 'float'>\n"
     ]
    }
   ],
   "source": [
    "from mindspore import dtype as mstype\n",
    "\n",
    "np_type = mstype.dtype_to_nptype(mstype.int32)\n",
    "ms_type = mstype.pytype_to_dtype(int)\n",
    "py_type = mstype.dtype_to_pytype(mstype.float64)\n",
    "\n",
    "print(np_type)\n",
    "print(ms_type)\n",
    "print(py_type)"
   ]
  }
 ],
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