title: vim: symbol lookup error: vim: undefined symbol: PyUnicodeUCS4_AsEncodedString
body: <p>Today I encountered a problem about vim:</p>
  
  <p>vim: symbol lookup error: vim: undefined symbol: PyUnicodeUCS4_AsEncodedString</p>
  
  <p>I didn't install any vim plugins. But I installed some Python projects(Nginx, uwsgi). Seemingly after these installations, vim crushed.</p>
  
  <p>Any clues?</p>