Want to check if a #Python dict contains a key? Use "in" on the dict: d = {'a':10, 'b':20, 'c':30} 'a' in d # True 'x' in d # False Searching in d.keys() is far slower: 'a' in d # 10 ns 'a' in d.keys() # 29 ns (!)

1 likes 0 replies