You are using pip version 18.1, however version 19.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
这是最底下的绿色错误部分,红色的就不多写了,写下遇到这个问题尝试的安装命令
通过pip3 install --upgrade pip -vv这个例子,我觉得,有时候安装不好,还是的多试下,可能就成功了