PyFortran

A Python interpreter for early FORTRAN, i.e. to run programs written for FORTRAN on the IBM 704 and FORTRAN / GOTRAN for the IBM 1620 or FORTRANSIT on the IBM 650

Usage:

python pyfortran.py [source file] [input file (optional)]

Differences between PyFortran and historical FORTRAN languages

• limited FORMAT support (just for PRINT statements)
• Source code can be in lowercase.
• Arrays can have more than three dimensions.
• Integer division works like in Python (e.g. 3/2 == 1.5 in Python 3, unlike in Python 2 or FORTRAN).
• Completely empty, non-comment lines are allowed.
• STOP or END are optional.
• Jumping out of loops probably causes problems when later entering same loop.
• Loops can use real numbers, not just integers. (But the loop variable can only increase, as in old FORTRAN.)

Credits

• Some Fortran demo programs from hughcoleman/retrocomputing, see LICENSE file in demo directory
• Some Fortran demo programs from rhobbie/Mkf2, see LICENSE_2 file in demo directory