import sys

appDescrFileName = sys.argv[1]
appDescrFile = open(appDescrFileName, "r")
appDescr = appDescrFile.read()
appDescrFile.close()
appName = appDescrFileName.split("/").pop()
appName = appName.split("-")[0] + ".swf"
appDescr = appDescr.replace("[This value will be overwritten by Flex Builder in the output app.xml]",appName)
appDescrFile = open(appDescrFileName, "w")
appDescrFile.write(appDescr)
appDescrFile.close()