如何在 Ubuntu 中安装 dryscrape?

如何在 Ubuntu 中安装 dryscrape?

我在 Ubuntu 16.04 的终端中运行此代码。

sudo -H pip install dryscrape

但运行此代码后显示此错误:

Requirement already satisfied: dryscrape in /usr/local/lib/python2.7/dist-packages
Requirement already satisfied: xvfbwrapper in /usr/local/lib/python2.7/dist-packages (from dryscrape)
Requirement already satisfied: lxml in /usr/local/lib/python2.7/dist-packages (from dryscrape)
Requirement already satisfied: webkit-server>=1.0 in /usr/local/lib/python2.7/dist-packages (from dryscrape)

这个问题该怎么解决?

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