Looks like the installation process has become much easier because the pyqt package gives everything you need to start developing once python is installed.
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I updated the example code to use the new module import line: What problems did you have setting up the environment? Thanks for these instructions, had some trouble getting the environment set up correctly. I think maybe it didn't work for me because I am behind a proxy.
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Also, it is great if the 'Download and install minimal MingGW' option works for you. For me, "from PyQt4.Qt import *" didn't work. The qt-win-opensource-4.2.2-mingw.exe 'Download and install minimal MingGW' option worked just fine. system variable PATH - include "C:\Qt\4.2.2\bin C:\Python25\Scripts C:\Python25 C:\Python25\DLLs ".Right-click on "My Computer" and select "Properties".Click "Finish" to finish the installation. You can install the 3.2 version from the mingw site, but the 3.6 version works. You will get an error message which says that the installer could not find a valid "w32api.h" file.
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Go to "Start" -> "All Programs" -> "Python 2.5" -> "IDLE (Python GUI)".Go to and select the "PyQt-Py2.5-gpl-4.4.2-1.exe" link.Install the PyQt 4.4 bundle (including QT 4.4) Go through the steps and accept the defaults.Go to and click on "Python 2.5.x Windows installer".Here are the steps to install and create a simple "Hello World" GUI application using PyQt 4.4, and Python 2.5, on Windows. Immediately following are the updated steps. Now all you need to do is install Python and the PyQt bundle.
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Update : PyQt has made the install process a lot simpler because it has bundled everything you need in one installer including QT 4.3 open source edition.