do script at frame with Python?

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I'm wondering if there's a way to spit out content to a text file whenever you hit a particular frame. So any time you hit frame 200, for example, it writes say a time stamp to the file.
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You can do it in the hou.session module. You can open it via Windows > Python Source editor. Then add something like this (mostly taken from the docs):

import hou

def outputPlaybarEvent(event_type, frame):
if frame == 200:
print frame

hou.playbar.addEventCallback(outputPlaybarEvent)

http://www.sidefx.com/docs/houdini13.0/hom/hou/playbar [sidefx.com]
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