Excel does things to CSV data that shouldn’t be done. Encodings are troublesome. (See ftfy, a miracle library for fixing them) Everything might be a date. Eve

Excel does things to CSV data that shouldn’t be done. Encodings are troublesome. (See ftfy, a miracle library for fixing them) Everything might be a date. Even genes. Leading zeros get dropped. Even when significant. (Like routing numbers) Long numeric strings get turned into scientific notation. (Like account numbers)