import re
import subprocess
import timeit
from typing import List

exp = re.compile("^[A-Z]{2,}$", re.M)

def print_sections(manpage: str):
    return list(map(lambda m: m.group(), exp.finditer(manpage)))


def main():
    man = subprocess.check_output(["man", "man"]).decode("utf-8")
    print(print_sections(man))


main()

# und nun die Messung
man_man = subprocess.check_output(["man", "man"]).decode("utf-8")

duration = timeit.timeit(lambda: print_sections(man_man), number=100)

print("Durchschnittliche Laufzeit in Sekunden:", duration)