title: "sys-package-mgr*: can't create package cache dir" when run python script with Jython
body: <p>I want to run Python script with Jython. </p>
  
  <p>the result show correctly, but at the same time there is an warning message, "sys-package-mgr*: can't create package cache dir"</p>
  
  <p>How could I solve this problem? </p>
  
  <p>thanks in advance~~~</p>