Lambda函数转换

Question

我一直在努力处理一段我无法理解的python代码。 它是一个嵌套的lambda函数，如下所示：

lambda l: lambda x: x[0] in [None if not i.object else i.object.key for i in l]

我试图翻译它，我想出了这个，但我不认为这是对的

 def f1(l):
     def f2(x):
           for i in l:
               if not i.object:
                  return None
               else
                  return x[0]

Answer 1

第1步：

def f1(l):
    def f2(x):
        xs = [None if not i.object else i.object.key for i in l]
        return x[0] in xs
    return f2

第2步：

def f1(l):
    def f2(x):
        xs = []
        for i in l:
            if not i.object:
                xs.append(None)
            else:
                xs.append(i.object.key)
        return x[0] in xs
    return f2