PyQt4中的Treeview

import sys 
from PyQt4 import QtCore, QtGui
from qyolk import Ui_QYolk
from yolk import yolklib

class StartQt4(QtGui.QMainWindow):
    def __init__(self, parent = None):
        QtGui.QWidget.__init__(self,parent)
        self.ui = Ui_QYolk()
        self.ui.setupUi(self)
        
        # set the widths of the columns
        self.ui.treeList.setColumnWidth(0,200)
        self.ui.treeList.setColumnWidth(1,100)
        
        # generator which returns list of installed packages
        packages = yolklib.Distributions()
        for pkg in packages.get_distributions('all'):
            a = QtGui.QTreeWidgetItem(self.ui.treeList)
            pk = str(pkg[0]).split(' ')
            if pkg[1]:
                status = 'Active'
                a.setTextColor(0, QtGui.QColor(0,0,255)) # setTextColor(Column ID, QtGui.QColor(R,G,B))根据RGB来设置颜色
                a.setTextColor(1, QtGui.QColor(0,0,255))
                a.setTextColor(2, QtGui.QColor(0,0,255))
            else:
                status = 'Not Active'
                a.setTextColor(0, QtGui.QColor(128,128,128))
                a.setTextColor(1, QtGui.QColor(128,128,128))
                a.setTextColor(2, QtGui.QColor(128,128,128))
            a.setText(0, pk[0])
            a.setText(1,pk[1])
            a.setText(2,status)              
        
        
if __name__ == "__main__":
    app =QtGui.QApplication(sys.argv)
    myapp =StartQt4()
    myapp.show()
    sys.exit(app.exec_())