Using cProfile results with KCacheGrind

I'm using cProfile to profile my Python program. Based upon this talk I was under the impression that KCacheGrind could parse and display the output from cProfile.

However, when I go to import the file, KCacheGrind just displays an 'Unknown File Format' error in the status bar and sits there displaying nothing.

Is there something special I need to do before my profiling stats are compatible with KCacheGrind?

...
if profile:
    import cProfile

    profileFileName = 'Profiles/pythonray_' + time.strftime('%Y%m%d_%H%M%S') + '.profile'

    profile = cProfile.Profile()
    profile.run('pilImage = camera.render(scene, samplePattern)')

    profile.dump_stats(profileFileName)
    profile.print_stats()
else:            
    pilImage = camera.render(scene, samplePattern)
...

Package Versions

KCacheGrind 4.3.1
Python 2.6.2

Solution

It can be done using an external module called lscallproftree

This article explains how: CherryPy - CacheGrind

With my resulting code looking like so:

...
if profile:
    import cProfile
    import lsprofcalltree

    profileFileName = 'Profiles/pythonray_' + time.strftime('%Y%m%d_%H%M%S') + '.profile'

    profile = cProfile.Profile()
    profile.run('pilImage = camera.render(scene, samplePattern)')

    kProfile = lsprofcalltree.KCacheGrind(profile)

    kFile = open (profileFileName, 'w+')
    kProfile.output(kFile)
    kFile.close()

    profile.print_stats()    
else:            
    pilImage = camera.render(scene, samplePattern)
...

If anyone knows a way to do this that doesn't require an external (ie. not shipped with Python) module, I'd still be very interested to hear about it.