#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Jun 14 11:24:26 2019

@author: kerkmann
"""

import numpy as np
import matplotlib.pyplot as plt

R = lambda z: np.abs(1 + z + z**2/2 + z**3/6 + z**4/24)

x = np.linspace(-4,4,101)
X, Y = np.meshgrid(x,x)
Z = R(X+Y*1j)

plt.plot(x,np.zeros_like(x),'k')
plt.plot(np.zeros_like(x),x,'k')

# Contourplot (2 Punkte)
plt.contour(X,Y,Z,[1])
#plt.plot(X*(Z<=1),Y*(Z<=1),'*')