Switch sign in bank qifs to fix import errors with YNAB

Swap sign in qif

import sys

def main(argv):
    for inFilename in argv:
        if not inFilename.endswith('.qif'):
            print "Error: expected QIF file"
            raw_input("Press enter to get outa here...")
            return 1

        outFilename = inFilename.replace('.qif', '.negated.qif')

        infile = open(inFilename, 'r')
        outfile = open(outFilename, 'w')

        negatedCount = 0
        for line in infile:
            if line.startswith('T-'):
                line = line.replace('T-', 'T', 1)
                negatedCount = negatedCount + 1
            elif line.startswith('T'):
                line = line.replace('T', 'T-', 1)
                negatedCount = negatedCount + 1
            outfile.write(line)

        infile.close()
        outfile.close()
        print "Found " + str(negatedCount) + " entries to negate. Wrote output to " + outFilename

    print "Processed " + str(len(argv)) + " files"
    raw_input("Press enter to get outa here...")
    return 0

if __name__ == "__main__":
    main(sys.argv[1:])