What is Recall in Python

Recall is number of labels that are predicted correctly against the real labels

Example :
An article that has valid tags by human (A) - Flower, Garden, Scenary
Machine learnt model predicts following tags (B)- Flower, Greenary, Nature, Spring, Eco-friendly

Recall = A n B
-----------
A

i.e 1 / 3 = 0.333

Recall is turning to be not a very significant measure in modern scale of data.