python映射字典到数组

Question

我有一个表格的数据列表:

[line1,a]
[line2,c]
[line3,b]

我想使用 a=5、c=15、b=10 的映射:

[line1,5]
[line2,15]
[line3,10]

我正在尝试使用这段代码，我知道它是不正确的，有人可以指导我如何最好地实现这一点:

mapping = {"a": 5, "b": 10, "c": 15}
applyMap = [line[1] = 'a' for line in data]

谢谢

编辑: 只是在这里澄清一下，对于一行，但是我希望这个映射发生在文件中的所有行:

输入:["line1","a"]

输出:["line1",5]

Answer 1

您可以尝试使用列表理解。

lines = [
   ["line1", "much_more_items1", "a"],
   ["line2", "much_more_items2", "c"],
   ["line3", "much_more_items3", "b"],
]
mapping = {"a": 5, "b": 10, "c": 15}
# here I assume the key you need to remove is at last position of your items
result = [ line[0:-1] + [mapping[line[-1]] for line in lines ]