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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getDefaultApplicationForMimeType(self, pchMimeType, pchAppKeyBuffer, unAppKeyBufferLen):
 """return the app key that will open this mime type"""


        fn = self.function_table.getDefaultApplicationForMimeType
        result = fn(pchMimeType, pchAppKeyBuffer, unAppKeyBufferLen)
        return result