Python 3中的一行技巧。*一個循環

Question

在Python 3. *中，是否有一種方法可以通過使用一行來實現相同的結果？

feature_combo = [(i,icol) for i,icol in enumerate(keepCols) if icol in features] 
feature_id = [i[0] for i in feature_combo] 
feat_name = [i[1] for i in feature_combo] 

## where keepCols=['a','b','c','d',...,'z']; features = ['b', 'c', ... , 't'] 

Answer 1

你的意思是這樣的：在一個行

feature_id, feat_name = zip(*feature_combo) 

或全部：

feature_id, feat_name = zip(*filter(lambda x: x[1] in features, enumerate(keepCols)))