Question

我需要从有<代码>__str__()方法的班次清单中抽取。

So potions is a list of objects of a class Potion. Potion __str__ method just returns the name of the potion. I thought of doing something like this

result = "
".join(potions)

但是,只有插手才能加入,一只狗知道如何在加入的每个类别中打上__str__()。

或应当这样做:

for potion in potions:
    result += "{0}
".format(potion)

也可能是 so?

Answer 1

稍微缩短的解决办法:

result = "
".join(map(str, potions))

Answer 2

result = "
".join(str(potion) for potion in potions)

也就是说,使用发电机的表述(同样也可以使用清单)

result = "
".join([str(potion) for potion in potions])

http://www.un.org/Depts/DGACM/index_french.htm

友情链接