What am I doing wrong?

[forumer444]

How do you filter out the letters in the "all_years.txt" file?

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I assume it goes in my appendFile() function.

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Am I getting anywhere? :(

I took out the appendFile() function.

# calculate function
def leapYear(year):
    """ Calculates whether a year is or isn't a leap year. """
    return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)

# main function
def main():
    try:
        file = open("all_years.txt", "r")
        lines = file.readlines()
        
        for line in lines:
            if leapYear(int(line)):
                file2 = open("leap_years.txt", "w")
                print(file2.write(line))
    except FileNotFoundError as e:
        print(e)
main()

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