The fparser package is a Python implementation of a Fortran 66/77/90/95/2003 language parser. Currently fparser actually includes two different implementations; the first, “fparser”, supports Fortran 66/77/90 (plus some extensions — see fparser) but only parses down to the level of individual lines of code, i.e. not the content of the Fortran expressions themselves. The second, “fparser2”, also has support for Fortran 2003 and is able to parse Fortran expressions. It is however, less mature than fparser.