#filterEmptyLines.py  test loop with nested if


def fileFilter():
    inName = raw_input("Enter input file name: ")
    outName = raw_input("Enter output file name: ")
    fin = open(inName)
    fout = open(outName, 'w')
    for line in fin:
        # fill in the part so only nonempty lines are copied


    fout.close()

fileFilter()