I want to know how to download as a CSV file a Pandas Dataframe when I'm using a Jupyter Notebok in Watson Studio.
I assume, you have created a pandas dataframe and now wondering where can you save the dataframe as csv file and then eventually download that saved csv file to your local machine.
You need to use project api to save the pandas dataframe as csv to project data asset as described in following link:-
# Save dataframe as csv file to storage
project.save_data(data=df.to_csv(index=False),file_name='iris1.csv',overwrite=True)
https://medium.com/ibm-data-science-experience/control-your-dsx-projects-using-python-c69e13880312
Once it is saved as data asset, you can use 3 dots menu next to this data asset in project to download that data asset to your local machine.
I hope it helps.