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What is wrong in reading Nifi flowfile and creating python(pandas)dataframe?

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I have scenario where I am getting the file(stream:flowfile of NIFI) as of type csv file, then creating the dataframe and dumping it thats it. But after creating the dataframe the structure of the file got disturbed, if I open the same flowfile on my disk i could see clear structure with columns separated with tab, but with python dataframe I am not getting the same structure, if I get same structure i can perform row manipulation.

 

Here What I am doing:
1: using ExecuteSQL processor, I am getting database record,

2: then passing this record to ConvertRecord processor  to convert this avro record type csv file separated by tab.
convertRecordSetWriter settings...
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The output of the flowfile is ...

Capture.PNG


3: Then the reading flowfile(step 2 folowfile) as python data using ExecuteStreamCommand, coz I am want to perform some action on the database record, to do this my record structure has been changed in data frame.
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