import matplotlib.pyplot as plt

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

m = [[3, 2, 1, 0], [2, 4, 1, 0], [2, 4, 1, 3], [4, 3, 1, 3]]
cs = plt.contour([3, 4, 2, 1], [5, 1, 2, 3], m)
p1 = cs.collections[0].get_paths()

for item in p1:
   print(item.vertices)

plt.show()