Empty values load differently in Python SDK and DB-Extractor

Hi, everyone

I'm trying to load sequences using Python SDK by inserting dataframes. In the dataframe, I have some columns with NaN and numeric values. 

Dataframe: 

and when loading NaN values, they are uploaded as 'null'. I've tried replacing them with empty strings, but due to the column definitions, if I have numeric values, the column's data type must be Double or Long, and conflicts arise when encountering empty strings.

This is the code to load a sequence:

Results in CDF using Python SDK:

However, when loading the sequence via DB-Extractor, empty strings are uploaded as such and not as 'null'

Is there any way to load via SDK so that NaN values are uploaded as empty and not 'null'? 

Regards,

Karina Saylema

@Aditya Kotiyal  @HanishSharma  @Jason Dressel  @Jairo Salaya @Liliana Sierra