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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 addFile(self,file):
 """ Permet d'ajouter un fichier Args: file (string):
 path d'un fichier json Returns: type: None Raises: FileFormatException: Erreur du format de fichier """

        mylambda= lambda adict : { key.upper() : mylambda(adict[key]) if isinstance(adict[key],dict) else adict[key] for key in adict.keys() }
        if file.endswith('.json') :
            with open(file, 'r') as f:
                fileContent = mylambda(json.load(f))

        elif file.endswith('.ini') :
            parser  = configparser.ConfigParser()
            parser.read(file)
            fileContent = { section : { conflist[0].upper() : conflist[1] for conflist in parser.items(section) } for section in parser.sections() }
        else :
            raise FileFormatException()

        self._config = {**self._config, **mylambda(fileContent)}