If you don’t want to do the csv-to-table code yourself, or just want a peak at some code that works I created a cloneable example app for this exact topic here: However It does not use pandas.
But if what you are trying to do is have the server process the file then follow @david.wylie 's example.
There are also a ton of forum posts about loading a file into a file loader as a media object and then using that on the server by turning the result of .get_bytes() from a media object back into a file or a file stream (file like object in memory).