import pykat kat = pykat.finesse.kat() kat.parseCommands(""" l l1 1 0 80 n1 l l2 1 0 90 n4 bs bs1 0.5 0.5 0 0 n1 n2 n3 n4 fsig noise l1 amp 1 0 1 hd hd1 0 n2 n3 xaxis hd1 phase lin 0 360 1000 """)