python - 如何重写 for 循环以列表理解

Question

我想知道是否有办法重新编写以下代码来列表理解。谢谢您

inputDict 是一个字典

result = {}
for key in inputDict:
    total = 0
    for nodes in inputDict :
        total = total + (key in inputDict[nodes])
    result.update({key : total})

Answer 1

如果我理解正确，你可以尝试:

result = dict((key, sum(key in inputDict[nodes] for nodes in digraph)) for key in inputDict)

或者如果您需要一个列表:

result = [(key, sum(key in inputDict[nodes] for nodes in digraph)) for key in inputDict]

或者:

result = [(key, sum(key in vals for nodes in digraph)) for key, vals in inputDict]