How to convert UiPath DataTable to python pandas DatafFrame

Hello, I have datatable in my Uipath project. I want to convert this datatable into pandas dataframe and process it with python code. And after doing python operations I want to get it back as uipath datatable. How can I do that ? :blush:

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When I pass a string variant to python activity, it can get the variant type successfully by python code.
However, when I pass a datatable to do so, I only get an error.
Finally, I convert datatable into json string first. Then pass it to python activity. And in the python code use below script to solve it. It works.

import pandas as pd
import json
def add(a):
data = json.loads(a)
df = pd.DataFrame(data)

Relatively, if want to retrive dataframe from python activity, also need to convert dataframe into json.