signal_selector.py

import numpy as np
import matplotlib.pyplot as plt

def create_signal(f):
  w = 2 * np.pi * f
  t = np.linspace(0, 0.1, 1000)
  value = np.sin(w * t)
  return t, value

t1, v1 = create_signal(10)
t2, v2 = create_signal(20)
v3 = list(map(lambda x, y: x if x > y else y, v1, v2))

plt.plot(t1, v1, linestyle="dashed")
plt.plot(t2, v2, linestyle="dashed")
plt.plot(t2, v3)
plt.show()