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# hamilton-help

Slackbot

02/16/2023, 12:59 PM

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Elijah Ben Izzy

02/16/2023, 2:15 PM

What is your driver expecting? Do you have a bunch of functions that take in series, and you have a dataframe you want to pass in?

Stefan Krawczyk

02/16/2023, 4:56 PM

@JVial we have thought about this — and right now:

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df.to_dict(orient="series")

Is a quick one liner that does the conversion. Our apprehension to do going it automatically is just around what is most obvious as to what is happening if someone was to come read the code after you wrote it.

JVial

02/17/2023, 11:49 AM

Thanks for the help :) I will test it soon :)

JVial

02/17/2023, 4:52 PM

Hi guys, so its not working 😞 I have a function which pass in a dataframe but i get the error -> Error: Required input my_dataframe not provided for nodes: ['business_travel'].

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my_dataframe = result_df.to_dict(orient="series")
hamilton_driver = driver.Driver(my_dataframe, module)
output = hamilton_driver.execute(output_columns)

and the transformation-script (at the moment really minimalistic)

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def business_travel(my_dataframe: pd.DataFrame) -> pd.DataFrame:
    <http://logger.info|logger.info>("Start with Transformation")

    return my_dataframe

👀 1

Stefan Krawczyk

02/17/2023, 5:17 PM

@JVial your

business_travel

function expects an input named “my_dataframe” that is of type DataFrame. You’re currently passing in a dict of series that doesn’t map to that expectation. So one way you can do it is like so:

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hamilton_driver = driver.Driver({}, module)
output = hamilton_driver.execute(output_columns, inputs={"my_dataframe": result_df)

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