. String of patterns separated by | to keep, could be a regular expression.
- exclude: Default is ‘#’ to remove comments. String of patterns separated by | to drop,could be a regular expression.
- raw    : Default is False, if True, returns list of raw strings. Useful to select <cite>cols</cite>.
- fix_format: Default is True, it sepearates numbers with poor formatting like 1.000-2.000 to 1.000 2.000 which is useful in PROCAR. Keep it False if want to read string literally.
- new_shape : Tuple of shape 