I am trying to add additional column to a Dataset that is created from a dictionary. I have headers defined separately. However, when dictionary is empty (no rows to export because how data is filtered) insert_col method fails with error:

File "/usr/local/lib/python3.10/site-packages/tablib/core.py", line 372, in _clean_col
    header = [col.pop(0)]
IndexError: pop from empty list

After looking in to the code of the method _clean_col, my guess, that if statement:

should be opposite:

        if not self.headers:
            header = [col.pop(0)]
        else:
            header = []

or:

        if self.headers:
            header = []
        else:
            header = [col.pop(0)]