readregistry issue

I'm sure that there's something silly that I'm missing here..

I'm trying to query the registry (Windows 7 64bit) to get my Python install path. For some reason, I'm getting:

Registry Path Not Found! - key=3D'SOFTWARE\Python\PythonCore\2.7\InstallPath\';hive=3D'LocalMachine'

However, if I replace my key with the sample in the documentation, all works fine. I've rebooted since installing Python (not sure whether or not that makes a difference). What am I missing here?
    
Thanks in advance,
Demian


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