Python模块不在正确的位置

We have CentOS 7 servers in a Hadoop cluster. Python and pip should have been installed on all of the server the same way because it was done with Ansible. But for some reason, there are some servers where Python cannot use the modules that were installed. For instance pandas was install, but when in python3.6, I get a 'No module named pandas' error.We have CentOS 7 servers in a Hadoop cluster. P