Grasshopper python command combining two if commands

Grasshopper
10

24%20PM
Screen Shot 2018-08-26 at 11.34.24 PM.png1492×448 97.3 KB

SortedCurves = sorted(curvess, key=lambda crv: crv.PointAt(0).Z)

Am I doing It wrong?

SortingPolylines.gh (11.1 KB)