如何从列表中返回元组值

Question

如何返回元组值1，值2..etc 一个接一个

def data ():
    List = [(1,"xyz",1.2), (1,"sgz",1.2), ...]
    return (1,"xyz",1.2), (1,"sgz",1.2), ...

Answer 1

使用yield代替return，如下所示：

>>> def data():
...     for i in [(1,"xyz",1.2), (1,"sgz",1.2)]:
...         yield i
...
>>> for x in data():
...   print(x)
...
(1, 'xyz', 1.2)
(1, 'sgz', 1.2)

现在data()就像列表一样 - 每次调用data()时，都会返回列表中的下一个项目。

Answer 2

仍然无法弄清楚你为什么要那样做。但是如果你想为列表中的每个元组分配变量，你可以执行以下操作（考虑到你知道列表有多少项）：

>>> def data():
        List = [(1,"xyz",1.2), (1,"sgz",1.2), ...]
        return List

>>> a, b, c = data()
>>> a
(1,"xyz",1.2)
>>> b
(1,"sgz",1.2)