import re
import subprocess
import timeit
from typing import List


def print_sections(manpage: str):
    return list(map(lambda m: m.group(), re.finditer("([A-Z]{2,})", manpage)))


def main():
    for tool in ["man", "coreutils", "vim", "bash", "rsync"]:
        try:
            man = subprocess.check_output(["man", tool]).decode("utf-8")
            print(print_sections(man))
        except subprocess.CalledProcessError:
            # manpage not found
            continue


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)