Python 字符串分词和递归

Question

我正在尝试创建一个接受输入的代码(下面的示例)

Input:
BHK158 VEHICLE 11
OIUGHH MOTORCYCLE 34.46
BHK158 VEHICLE 12.000
TRIR TRUCK 2.0
BLAS215 MOTORCYCLE 0.001
END

并生成一个输出，其中列出了每个车牌号，总成本列在旁边(示例如下)

Corresponding output:
OIUGHH: 5.8582
BHK158: 5.75
TRIR: 2.666
BLAS215: 0.00017

车辆牌照每公里收费 0.25 美元(公里为输入列表中的数值)，卡车每公里收费 1.333 美元，摩托车每公里收费 0.17 美元。输出按降序排列。

到目前为止，这是我的代码:

fileinput = input('Input: \n')
split_by_space = fileinput.split(' ')

vehicles = {}


    if split_by_space[1] == 'VEHICLE':
        split_by_space[2] = (float(split_by_space[2]) * 0.25) 
    elif split_by_space[1] == 'TRUCK':
        split_by_space[2] = float(split_by_space[2]) * 1.333 
    elif split_by_space[1] == 'MOTORCYCLE':
        split_by_space[2] = float(split_by_space[2]) * 0.17 

    if split_by_space[0] in vehicles:
        previousAmount = vehicles[split_by_space[0]]
        vehicles[split_by_space[0]] = previousAmount + split_by_space[2]
    else:
        vehicles[split_by_space[0]] = split_by_space[2]

谢谢，任何帮助/提示将不胜感激。

Answer 1

通过你的代码我注意到了一些事情，python 中的列表索引从 0 而不是 1 开始，所以你会遇到一堆越界错误。其次，输入只接受输入的第一行，所以它永远不会超过第一行。 .split() 默认按 \n 拆分文本，您必须指定是否要按其他内容(如空格)拆分。

test.txt内容:

BHK158 VEHICLE 11
OIUGHH MOTORCYCLE 34.46
BHK158 VEHICLE 12.000
TRIR TRUCK 2.0
BLAS215 MOTORCYCLE 0.001

python代码:

fileinput = open('test.txt', 'r')
lines = fileinput.readlines()

vehicles = {}

for line in lines:
    split_by_space = line.split(' ')
    if split_by_space[1] == "VEHICLE":
        split_by_space[2] = (float(split_by_space[2]) * 0.25)
    elif split_by_space[1] == "TRUCK":
        split_by_space[2] = float(split_by_space[2]) * 1.333
    elif split_by_space[1] == "MOTORCYCLE":
        split_by_space[2] = float(split_by_space[2]) * 0.17


    if split_by_space[0] in vehicles:
        previousAmount = vehicles[split_by_space[0]]
        vehicles[split_by_space[0]] = previousAmount + split_by_space[2]
    else:
        vehicles[split_by_space[0]] = split_by_space[2]

输出:

{'BLAS215': 0.00017, 'OIUGHH': 5.858200000000001, 'TRIR': 2.666, 'BHK158': 5.75}