打印列表和内存位置显示有问题

Question

我想打印一个列表（请参见下面的代码），但是我得到了内存位置

finallist = []
list_upper = []
list1 = ['this', 'is', 'a', 'book']
finallist = [word[0] for word in list1]
print(finallist)
list_upper = [i.upper for i in finallist]
print(list_upper)

但是结果是：

['t', 'i', 'a', 'b']
[<built-in method upper of str object at 0x00000000004D85E0>, <built-in 
method upper of str object at 0x000000000051B730>,

Answer 1

您需要通过在末尾附加()来调用该函数：

list_upper = [i.upper() for i in finallist]