问题描述：
今天想学习一下TUM数据集RGBD-Benchmark工具的使用，利用python进行相关操作时，缺少一个第三方模块，于是打算用pip进行安装，便出现如下图所示的问题。
解决办法：
执行如下语句：
sudo python -m pip install --upgrade pip
温馨提示：
过程中可能会出出现失败的情况，反复多试几次就好了
成功截图：
解决如下问题：You are using pip version 8.1.1, however version 18.0 is available. You should consider upgrading via the 'pip install --upgrade pip' command.
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