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+====== Python 常用命令 ======
+----
+===== 更换国内pypi镜像 =====
+国内pypi镜像
+阿里：https://mirrors.aliyun.com/pypi/simple
+豆瓣：http://pypi.douban.com/simple
+中国科学技术大学：http://pypi.mirrors.ustc.edu.cn/simple/
+指定单次安装源
+pip install <包名> -i http://pypi.v2ex.com/simple
+指定全局安装源
+在unix和macos，配置文件为：$HOME/.pip/pip.conf
+在windows上，配置文件为：%HOME%\pip\pip.ini
+[global]
+timeout = 6000
+  index-url = http://pypi.douban.com/simple
+卸载包
+pip uninstall <包名> 或 pip uninstall -r requirements.txt
+===== 升级包 =====
+pip install -U <包名>
+或：pip install <包名> --upgrade
+===== 升级pip =====
+pip install -U pip
+pip install -U pip -i https://mirrors.aliyun.com/pypi/simple
+===== 重装pip =====
+python -m pip install --upgrade --force-reinstall pip -i https://mirrors.aliyun.com/pypi/simple
+===== 安装包 =====
+pip install zeroconf -i https://pypi.tuna.tsinghua.edu.cn/simple
+===== Reinstall pip =====
+  python -m ensurepip
+  python -m pip install --upgrade pip

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