ERROR: Cannot uninstall 'PyYAML'. It is a distutils installed project and thus we cannot accurately
ERROR: Cannot uninstall 'PyYAML'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
错误：无法卸载“ PyYAML”。 这是一个distutils安装的项目，因此我们无法准确确定属于该文件的文件，而这只会导致部分卸载。
我在ubuntu中安装kolla-ansible时报了上面这个错误 sudo pip install kolla-ansible
然后将安装命令改为sudo pip install kolla-ansible --ignore-installed PyYAML就行了.
加的--ignore-installed PyYAML应该是通过 pip 安装 kolla-ansible时，忽略某些依赖，此处为PyYAML。