Write a program that copies a text file source.txt onto target.txt barring the lines

Q. Write a program that copies a text file "source.txt" onto "target.txt" barring the lines starting with a "@" sign.

Answer :-

def filter (oldfile, newfile):
    fin = open(oldfile, "r")
    fout = open(newfile, 'w')
    while True:
        text = fin.readline()
        if len(text) == 0:
            break
        if text [0] = "@":
            continue
        fout.write(text)
    fin.close()
    fout.close()

Output :-

>>>filter("source.txt", "target.txt")