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    "# Chapter 2. Installing Python environments\n",
    "\n",
    "这章，讲解如何安装Python的环境"
   ]
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    "## Windows\n",
    "\n",
    "### 安装Anaconda\n",
    "\n",
    "由于Anaconda集成了大部分的python包，因此能够很方便的开始使用。由于网络下载速度较慢，因此推荐使用镜像来提高下载的速度。\n",
    "\n",
    "在这里找到适合自己的安装文件，然后下载\n",
    "https://mirrors.tuna.tsinghua.edu.cn/anaconda/archive/\n",
    "\n",
    "设置软件源 https://mirror.tuna.tsinghua.edu.cn/help/anaconda/\n",
    "```\n",
    "conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/\n",
    "conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/\n",
    "conda config --set show_channel_urls yes\n",
    "```\n",
    "\n",
    "### 安装Pytorch\n",
    "```\n",
    "conda install pytorch -c pytorch \n",
    "pip3 install torchvision\n",
    "```\n",
    "\n",
    "\n",
    "## Linux\n",
    "\n",
    "### 安装pip\n",
    "```\n",
    "sudo apt-get install python3-pip\n",
    "```\n",
    "\n",
    "### 设置PIP源\n",
    "```\n",
    "pip config set global.index-url 'https://mirrors.ustc.edu.cn/pypi/web/simple'\n",
    "```\n",
    "\n",
    "### 安装常用的包\n",
    "```\n",
    "sudo pip install scipy\n",
    "sudo pip install scikit-learn\n",
    "sudo pip install numpy\n",
    "sudo pip install matplotlib\n",
    "sudo pip install pandas\n",
    "sudo pip install ipython\n",
    "sudo pip install jupyter\n",
    "```\n",
    "\n",
    "### 安装pytorch\n",
    "到[pytorch 官网](https://pytorch.org)，根据自己的操作系统、CUDA版本，选择合适的安装命令。\n",
    "\n",
    "例如Linux, Python3.5, CUDA 9.0：\n",
    "```\n",
    "pip3 install torch torchvision\n",
    "```\n",
    "\n"
   ]
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