learn_pytorch_01_install_pytorch.ipynb

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    "## 1 环境说明 \n",
    "电脑环境：win 10系统 或者 ubuntu 18.04    \n",
    "python版本：3.7.4 anaconda环境  \n",
    "仅用CPU，GPU未涉及  "
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    "## 2 安装cpu版本pytorch\n",
    "###  创建虚拟环境，安装pytorch\n",
    "创建名为pytorch的虚拟环境：conda create -n pytorch python=3.7.4  \n",
    "查看系统中安装的所有虚拟环境：conda info --envs    \n",
    "激活pytorch虚拟环境：conda activate pytorch    \n",
    "安装pytorch：pip install -i https://pypi.tuna.tsinghua.edu.cn/simple torch==1.2.0  \n",
    "\n",
    "### pytorch官方安装教程 (国内极慢，别用，谁用谁怀疑人生！)\n",
    "https://pytorch.org/"
   ]
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  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
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   "source": [
    "import torch  \n",
    "import torchvision"
   ]
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   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
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     "text": [
      "1.2.0\n"
     ]
    }
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   "source": [
    "print(torch.__version__)"
   ]
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   "execution_count": 11,
   "metadata": {},
   "outputs": [
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     "name": "stdout",
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     "text": [
      "0.4.0\n"
     ]
    }
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   "source": [
    "print(torchvision.__version__)"
   ]
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   "source": [
    "torch.cuda.is_available()  # GPU不可用"
   ]
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   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
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