read_fwf does not take into account skiprows when inferring column width
read_fwf can automatically detect column widths, but that does not seem to take into account rows to be skipped (parameter skiprows).
So, if the file contains text before the data, column detection fails. It could be solved by using only the actual data lines (and header) to infer column widths.
I worked around that issue by opening the text file, calling readline as many times as necessary (= skiprows), and then calling read_fwf on that buffer (with skiprows=0)
