def get_tf_metric(text):
	"""
	Computes the tf metric

	Params:
	text (tuple): tuple of words

	Returns:
	tf_text: format: ((word1, word2, ...), (tf1, tf2, ...))
	"""

	counts = [text.count(word) for word in text]
	max_count = max(counts)
	tf = [counts[i]/max_count for i in range(0, len(counts))]

	return text, tf