#!/usr/bin/python script to calculate square roots by bisection (cbob dowling licensed under gpl text input('number?'number float(textneed real number magic line for executable files fubar py instead of python fubar py you may encounter "hash plingfirst line in many imported python scripts this is part of some "unix magicthat lets us simplify our command lines we can' demonstrate it here because the mcs file server doesn' support unix semantics