Tobias C. Rittweiler schrieb: > Hi! > > Has anyone added special syntax to allow writing numeric literals with > physical units? So you can write 12m + 34cm, and would get 12.34m. > > My question is how would you modify the BNF the most sensible way to > allow for this? The above example is simple, but think of 42 km/h.
You don't need special syntax in order to work with units. You just need to normalize all input to SI units like meter, second and meter per second: km=1000. m=1. dm=0.1 cm=0.01 mm=0.001 s= 1. h = 3600. m_s=m/s km_h=km/h length_in_mm = (12*m + 34*cm)/mm speed = 5*km_h For what purpose do you want to have physical units in Python syntax? Do you need to verify your formulas? Christian _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
