def callback()

in scripts/generate_banner.py [0:0]

• 5 lines of code
• 1 McCabe index (conditional complexity)

def callback(xk):
    print(xk)
    print(rosen_der(xk["x"]))
    dr = rosen_der(xk["x"])
    log.append([xk["x"][0], xk["x"][1], -lr * dr[0], -lr * dr[1]])