The following code, taken from https://www.thoughtco.com/using-pickle-to-save-objects-2813661, throws TypeError: write() argument must be str, not bytes
I am using Ubuntu 21.04, python 3.9.5, and it may well be the case that I have screwed something up in my python install, but I have no idea how I should go about solving the problem.
import pickle
import math
object_pi = math.pi
file_pi = open('filename_pi.obj', 'w')
pickle.dump(object_pi, file_pi)
