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import sys, getopt

def processArguments(argv):
    global inputfile
    global outputfile
    try:
        opts, args = getopt.getopt(argv,"i:o:", [])
    except getopt.GetoptError:
        print 'frompbtopbtxt.py -i <inputfile> -o <outputfile>'
    for opt, arg in opts:
        if opt == '-i':
            inputfile = arg
        if opt == '-o':
            outputfile = arg
            
if __name__ == "__main__":
    processArguments(sys.argv[1:])