Python字典参数错误

Question

我实际上是为Raspberry Pi的GPIO端口编写一个控制程序，我用python进行编程，并希望使用字典来完成。

好的，要设置一个GPIO端口，它需要2个参数，正如您在字典表中看到的那样，我使用了两个参数，当您编写“ 00”之类的东西时应该获得该参数。

例如，能够控制GPIO端口的代码是：

output(11, low)

正如您在字典中看到的那样，我应该像上面的代码中那样返回两个参数，但是仍然出现一个错误，即只有一个参数而不是两个。 这是我的代码

import RPi.GPIO as GPIO
from RPi.GPIO import input as input
from RPi.GPIO import output as output
from RPi.GPIO import HIGH as high
from RPi.GPIO import LOW as low
from time import sleep as sleep


GPIO.setmode(GPIO.BOARD)
entry = raw_input("Which port you want to control?:")

while entry != "xx" :
    io = {
       '00' : "11, low",
       '01' : "11, high", 
       '10' : "12, low", 
       '11' : "12, high",
       '20' : "13, low", 
       '21' : "13, high", 
       '30' : "15, low", 
       '31' : "15, high", 
       '40' : "16, low", 
       '41' : "16, high", 
       '50' : "18, low", 
       '51' : "18, high", 
       '60' : "22, low", 
       '61' : "22, high", 
       '70' : "7, low", 
       '71' : "7, high", 
       '80' : "3, low", 
       '81' : "3, high", 
       '90' : "5, low", 
       '91' : "5, high", 
       '100' : "24, low", 
       '101' : "24, high", 
       '110' : "26, low", 
       '111' : "26, high", 
       '120' : "19, low", 
       '121' : "19, high", 
       '130' : "21, low", 
       '131' : "21, high", 
       '140' : "23, low", 
       '141' : "23, high", 
       '150' : "8, low", 
       '151' : "8, high", 
       '160' : "10, low", 
       '161' : "10, high"
       }

    output(io[entry])
    entry = raw_input("Which port you want to control?:")

Answer 1

代替：

io = {
       '00' : "11, low",
       '01' : "11, high", 
       # snip...
}

使您的价值观元组：

io = {
    '00': (11, low),
    '01': (11, high)
    # etc...
}

然后解压缩它们作为output参数，例如：

output(*io[entry])

目前，您正在尝试传递output 11, high的单个字符串11, high而该字符串似乎需要两个参数：一个整数以及high值或low 。

边注：

我还将io分配移到循环外（不要继续设置它），然后将while更改为a for利用两个参数的iter ，例如：

io = { ... }
for entry in iter(lambda: raw_input('Which port?: '), 'xx'):
    output(*io[entry])
    # rest of stuff...