def remove_empty_files(data_dic,threshold=5):
	""" Remove the empty files from dict.
		An empty file is a file where the number of chars is
		below the threshold.
		return a dict and a list of removed files
	"""
	removed_files_list = [file for file in data_dic.keys() if len(data_dic[file]['text'])<=threshold ]
	for file in removed_files_list:
		del data_dic[file]
	return data_dic,removed_files_list