xvfb啓動PyQt4程序報Unable to load library icui18n錯誤

xvfb啓動PyQt4程序報以下錯誤：

Unable to load library icui18n "Cannot load library icui18n: (libicui18n.so.48: cannot open shared object file: No such file or directory)"

解決方法：

sudo apt-get install libicu48

參考：https://forums.virtualbox.org/viewtopic.php?f=7&t=49854