I have a huge dataset in a csv file that I'm reading via a python node, I want to go through the data and find specific cells and assign those values (from the csv) to points with specific attribute values from the geo. Does anybody know a good approach for such a task? I've been trying out a few ideas but I still haven't found a working solution

Here's one way, its easiest to just slurp in all the data in one hit, then slice and dice afterwards using native houdini tools.

https://www.tokeru.com/cgwiki/HoudiniPython#Read_a_csv_as_points_with_attributes [www.tokeru.com]