import re

falsch = "If the the problem is textual, use the the re module"
richtig = re.sub(r"the (the)", r"\1", falsch)

print(richtig)

test = "Ingeborg Sülzer-Toft"
match = re.search(r"(.*?)\.", test)
if match:
    name = re.sub(r"([A-Za-zäöüÄÖÜ]+).([A-Za-zäöüÄÖÜ]-+) ([A-Za-zäöüÄÖÜ]-+)(?: ([A-Za-zäöüÄÖÜ]-+))?", r"\1 \2 \3 \4", test)
    #Titel (optional), Vorname, Zweitname (optional) und Nachname
    parts = name.split()
    print("1= ", parts[0])
    print("2= ", parts[1])
    if len(parts) == 3:
        print("3= ", parts[2])
    if len(parts) == 4:
        print("4= ", parts[3])