ImportError: No module named PyQt4.QtGui

[守株待兔]

i have  installed such things:

sudo apt-get install libqt4-dev
sudo apt-get install g++ automake
sudo apt-get install qt4-dev-tools qt4-designer qt4-doc
sudo apt-get install libqt4-opengl-dev
sudo apt-get install libqt4-sql-mysql libqt4-sql-odbc libqt4-sql-psql libqt4-sql-sqlite libqt4-sql-sqlite2

when i finished,input 
>>>from PyQt4.QtCore import *
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
ImportError: No module named PyQt4.QtCore
 
would you mind to tell me how to solve it?
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