[Python] Cosine Similarity between 2 Number Lists

I want to calculate the cosine similarity between two lists, let's say for example list 1 which is dataSetI and list 2 which is dataSetII.

Let's say dataSetI is [3, 45, 7, 2] and dataSetII is [2, 54, 13, 15]. The length of the lists are always equal. I want to report cosine similarity as a number between 0 and 1.

dataSetI = [3, 45, 7, 2]
dataSetII = [2, 54, 13, 15]

def cosine_similarity(list1, list2):
# How to?
pass

print(cosine_similarity(dataSetI, dataSetII))

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