python词典值和键

Question

我有字典叫做人类.我想循环遍历该字典,如果值小于20打印字典键.

humans = {"Danny": 33, "Jenny": 22, "Jackie": 12, "Ashley": 33}

Answer 1

您好约翰,欢迎来到Stack Overflow.您对问题的描述几乎是一个完美的伪代码,用于实现:

# I've got dictionary called humans. 
humans = {"Danny": 33, "Jenny": 22, "Jackie": 12, "Ashley": 33}

for key, value in humans.items():  # I want to loop through that dictionary 
    if value < 20:                 # and if value is less than 20
        print(key)                 # print dictionary key.