code: def penalty4(x):  # <= 0.0
      return x[3] - 240.0
  
file_path: mystic/examples2/vessel_alt.py
imports: from vessel import objective, bounds, xs, ys
  from mystic.constraints import as_constraint
  from mystic.penalty import quadratic_inequality
label_desc: Use image node_id 4 for calling a global function with example usage: penalty4(x) and returns: unknown