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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 run(self):
 """Starts the uploading thread."""

        root_path, folder_name = os.path.split(self.root_folder)
        self.root_folder = os.path.join(root_path, folder_name)
        for dirname, _, fnames in os.walk(self.root_folder):
            self.upload_files_in_folder(dirname, fnames)