in A : column matrix, u1 : vector, u2 : vector, v1 : vector, v2 : vector, a : scalar, b : scalar, y : vector, z : vector out B : column matrix, x : vector, w : vector { B = A + u1 * v1' + u2 * v2' x = b * (B' * y) + z w = a * (B * x) } ''' theresult = None print program try: theresult = mparser.processString(program) except: pass # Errors are stored in the mparser.lex.errors list if theresult and len(mparser.lex.errors) == 0: print >>sys.stdout, 'Successfully parsed program.' else: print '*** Errors\n', ' '.join(mparser.lex.errors)