python - 为[字符串]/[列表中的项目]赋值

Question

我正在创建一个纸牌游戏 - 二十一点 - 并且需要向用户显示一个字符串，但要跟踪每张纸牌在计算中的得分。因此，我创建了一个包含卡片所有值的列表:

cards = [1,1,1,1,2,2,2,2,3,3,3,3,...]

但对于用户来说，例如，如果列表中的项目是 13，我想显示 King。我如何制作包含这些值的字典/键或数组？我无法使用基于位置的字典，因为一旦发牌，我会将其从 list/deck 中删除。

Answer 1

您只需定义一个字符串列表:

cardnames = ["Ace","2","3","4","5","6","7","8","9","10","Jack","Queen","King"]

现在如果卡片的值为v，则可以通过cardnames[v-1]获取对应的名称。例如:

v = 5
print("I have a %s"%cardnames[v-1])

在这种情况下，jack 的值为 11，Queen 为 12，King 为 13。例如(使用 python 的交互式 shell):

$ python
Python 2.7.9 (default, Apr  2 2015, 15:33:21) 
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> cardnames = ["Ace","2","3","4","5","6","7","8","9","10","Jack","Queen","King"]
>>> v=12
>>> print("I have a %s"%cardnames[v-1])
I have a Queen
>>> v=7
>>> print("I have a %s"%cardnames[v-1])
I have a 7
>>> v=1
>>> print("I have a %s"%cardnames[v-1])
I have a Ace
>>> v=13
>>> print("I have a %s"%cardnames[v-1])
I have a King

或者使用python3:

$ python3
Python 3.4.3 (default, Mar 26 2015, 22:03:40) 
[GCC 4.9.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> cardnames = ["Ace","2","3","4","5","6","7","8","9","10","Jack","Queen","King"]
>>> v=12
>>> print("I have a %s"%cardnames[v-1])
I have a Queen
>>> v=7
>>> print("I have a %s"%cardnames[v-1])
I have a 7
>>> v=1
>>> print("I have a %s"%cardnames[v-1])
I have a Ace
>>> v=13
>>> print("I have a %s"%cardnames[v-1])
I have a King