Registering pandas dataframe as dataset in python script file

I am trying to register the pandas dataframe , so i written code (Dataset.Tabular.register_pandas_dataframe(df, target='',name)) and
i saved it in .py file where actual data will be treated missing values, and get the data and then registering that data, but while running i am getting error as ' local source path is not supported when i give datastore as 'target

then i gave local path, then it is throwing error 'target type is not supported'

can any one please help me with this?