code: def equations(len=3):
      eqn = "\nsum(["
      for i in range(len):
          eqn += "x%s**2, " % str(i)
      return eqn[:-2] + "]) - 1.0 = 0.0\n"
  
file_path: mystic/examples2/g03.py
imports: from mystic.symbolic import generate_constraint, generate_solvers, simplify
  from mystic.symbolic import generate_penalty, generate_conditions
label_desc: Use image node_id 5 for calling a global function with example usage: equations(len) and returns: unknown