import math
import sympy as sp
import numpy as np
import matplotlib.pyplot as plt
x,y,z = sp.symbols('x y z')

n=1 # order of derivative
def f(x):
   g=z**(-z)
   h=sp.diff(g,z,n)
   q=h.subs(z,x)
   return q

x1=np.arange(0,5,0.5)
plt.plot(x1,f(x1))
plt.show()