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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 update_file(self, content):
 """ It will convert json content to json string and update into file. Return: Boolean True/False """

        updated_content = json.dumps(content)
        file_obj = open(self.file, 'r+')
        file_obj.write(str(updated_content))
        file_obj.close()
        return True