But hang-on what does it output? So here is us, on the raggedy edge. Same as ‘e’ except it uses an upper case ‘E’ as the separator character. ‘f’ Fixed point. Changed in version 2.7: Added the ‘,’ option (see also PEP 378). width is a decimal integer defining the minimum field width. If not specified, then the field width will be determined by the content. This is helpful if you want to pass a lot of content into a macro.