@james_kibugu - Domo is expecting the dictionary keys to be non-empty due to how it processes the data however normal python is ok with having non-empty strings. I'd recommend adding a check in your code to look for empty strings and then set it to a specific value or ignore those records in your dataset.

Hey @james_kibugu - Not sure if you could resolve this, but if you're trying to pivot your data on column names which are numbers, then you might get this error.