Modifying a date format

[jehoshua]

You don't need testit.
try this (as I cannot test):

Thanks, I only had to modify line 5 as it didn't like double quotes within the "F" statement, so ..

import datetime

def convert_date(orig):
    massaged_date = orig.replace("'", "/")[1:]
    return f"D{datetime.datetime.strftime(datetime.datetime.strptime(massaged_date, '%m/%d/%Y'), '%m/%d/%Y')}"

def clean_file(filename):
    with open(filename,"r") as f:
        line = f.readline().strip()

        if line[0] == "D":      # this could also read "if line.startswith("D"):"
            convert_date(line)
            print(line)
        else:
            print(line)

clean_file("ANCU.qif")

it only read one line, so I added a "for" loop but that didn't work.