电路| Trackback Valueerror | ＆gt; button_a正在使用＆lt;

Question

上下文

我希望我能得到一些帮助。预先感谢

我最近获得了一个大学的电路游乐场快车作为大学的项目，并且我正在遇到一些问题，特别是因为追溯不断给我一个错误，我不知道该如何解决，我已经尝试了现在有几件事，没有什么不同。

我正在为电路python使用IDE，称为“ MU编辑器” https://codewith.mu/en/nodload ，这为我提供了一些有趣的工具，使我的工作变得更加容易。 （我必须澄清一下我从未在python中编码，所以我有点迷失在所有内容中）

错误

Traceback (ultima llamada reciente):
Archivo "code.py", línea 61, en <module>
ValueError: BUTTON_A está siendo utilizado

El código terminó de ejecutar.

---

代码，这是错误的代码，

我在这些代码上特别遇到了问题：

• 可变a_but ，它将请允许我使用电路游乐场的按钮_a，因此按下

a_but = DigitalInOut(board.D4)
a_but.direction = Direction.INPUT
a_but.pull = Pull.DOWN

• actible b_but 时，它可以做一些事情，这将使我可以使用电路游乐场的button_b，因此在按下时会执行某些操作

b_but = DigitalInOut(board.D5)
b_but.direction = Direction.INPUT
b_but.pull = Pull.DOWN

• 可变像素将使我可以访问

pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=1.0)

---

使用时上述变量的电路游乐场 示例：

• a_but 示例b_but

while True:
     if a_but.value:
        print("Button A pressed")

     if b_but.value:
        print("Button B pressed")

• 像素

if temp < 36:
   pixels[0] = (0, 0, 255)
   pixels[1] = (0, 0, 255)
   pixels[2] = (0, 0, 255)

elif temp >= 36 and temp <= 37.2:
     pixels[3] = (0, 0, 255)
     pixels[4] = (0, 0, 255)
     pixels[5] = (0, 0, 255)
     pixels[6] = (0, 0, 255)

else:
     pixels[7] = (0, 0, 255)
     pixels[8] = (0, 0, 255)
     pixels[9] = (0, 0, 255)

---

在您想查看的情况下，这是完整的代码（这可能会有一些错误，因为该错误阻止了我继续前进）：

import time
import analogio
import board
import neopixel
import pulseio
import digitalio
from digitalio import DigitalInOut, Direction, Pull
import adafruit_irremote

import adafruit_thermistor
from adafruit_circuitplayground import cp


def sign(value):
    if value > 0:
        return 1
    if value < 0:
        return -1
    return 0


def pulse_test():
    # Turn only pixel #1 green
    pixels[1] = (0, 255, 0)

    # How many light readings per sample
    NUM_OVERSAMPLE = 10
    # How many samples we take to calculate 'average'
    NUM_SAMPLES = 20
    samples = [0] * NUM_SAMPLES

    i = True
    while i:
        for i in range(NUM_SAMPLES):
            # Take NUM_OVERSAMPLE number of readings really fast
            oversample = 0
            for s in range(NUM_OVERSAMPLE):
                oversample += float(light.value)
            # and save the aver age from the oversamples
            samples[i] = oversample / NUM_OVERSAMPLE  # Find the average

            mean = sum(samples) / float(len(samples))  # take the average
            print((samples[i] - mean,))  # 'center' the reading

            if i > 0:
                # If the sign of the data has changed munus to plus
                # we have one full waveform (2 zero crossings), pulse LED
                if sign(samples[i] - mean) <= 0 and sign(samples[i - 1] - mean) > 0:
                    pixels[9] = (200, 0, 0)  # Pulse LED
                else:
                    pixels[9] = (0, 0, 0)  # Turn LED off

            time.sleep(0.025)  # change to go faster/slower

        if b_but.value:
            i = False

    pixels[1] = (0, 0, 0)
    pixels[9] = (0, 0, 0)

a_but = DigitalInOut(board.D4)
a_but.direction = Direction.INPUT
a_but.pull = Pull.DOWN

b_but = DigitalInOut(board.D5)
b_but.direction = Direction.INPUT
b_but.pull = Pull.DOWN

pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=1.0)
light = analogio.AnalogIn(board.LIGHT)

RED = (255, 0, 0)
YELLOW = (255, 255, 0)
GREEN = (0, 255, 0)
CYAN = (0, 255, 255)
BLUE = (0, 0, 255)
PURPLE = (180, 0, 255)
PIXELS_OFF = (0, 0, 0)

pulsein = pulseio.PulseIn(board.IR_RX, maxlen=120, idle_state=True)
decoder = adafruit_irremote.GenericDecode()

while True:

    pulse = decoder.read_pulses(pulsein)
    try:
        received_code = decoder.decode_bits(pulse)
        print("\n\nSeñal Adquirida : ", received_code)

        if received_code == (223, 32, 111, 144):
            print("¡Sospecha de infeccion detectada!\n\n")
            for i in range(3):
                pixels.fill(YELLOW)
                pixels.show()
                time.sleep(0.05)

                pixels.fill(PIXELS_OFF)
                pixels.show()
                time.sleep(0.05)

            print("¿Desea realizar un testeo basico?:")
            print("\n\n Si. Presione A\n No. Presione B")
            pixels[0] = (0, 255, 0)
            pixels[1] = (0, 255, 0)
            pixels[2] = (0, 255, 0)
            pixels[3] = (0, 255, 0)
            pixels[4] = (0, 255, 0)
            pixels[5] = (255, 0, 0)
            pixels[6] = (255, 0, 0)
            pixels[7] = (255, 0, 0)
            pixels[8] = (255, 0, 0)
            pixels[9] = (255, 0, 0)

            while True:
                if a_but.value:
                    testeo_respuesta = True
                    for x in range(2):
                        pixels.fill(PIXELS_OFF)
                        pixels.show()
                        for i in range(9):
                            pixels[10] = (0, 255, 0)
                            time.sleep(0.075)
                    break

                if b_but.value:
                    testeo_respuesta = False
                    for x in range(2):
                        pixels.fill(PIXELS_OFF)
                        pixels.show()
                        for i in range(9):
                            pixels[i] = (255, 0, 0)
                            time.sleep(0.075)
                    break
                time.sleep(0.075)

            pixels.fill(PIXELS_OFF)
            pixels.show()

            if testeo_respuesta:

                for test_num in range(19):
                    regTemp = [cp.temperature] * test_num
                    time.sleep(1.0)
                for k in range(19):
                    pixels[0] = (0, 0, 255)
                    temp = 0
                    if temp < regTemp[k]:
                        temp = regTemp[k]
                    pixels[0] = (0, 0, 0)
                    time.sleep(0.5)

                if temp < 36:
                    pixels[0] = (0, 0, 255)
                    pixels[1] = (0, 0, 255)
                    pixels[2] = (0, 0, 255)
                    pixels[3] = (0, 0, 0)
                    pixels[4] = (0, 0, 0)
                    pixels[5] = (0, 0, 0)
                    pixels[6] = (0, 0, 0)
                    pixels[7] = (0, 0, 0)
                    pixels[8] = (0, 0, 0)
                    pixels[9] = (0, 0, 0)
                    resultado = True
                elif temp >= 36 and temp <= 37.2:
                    pixels[0] = (0, 0, 0)
                    pixels[1] = (0, 0, 0)
                    pixels[2] = (0, 0, 0)
                    pixels[3] = (0, 0, 255)
                    pixels[4] = (0, 0, 255)
                    pixels[5] = (0, 0, 255)
                    pixels[6] = (0, 0, 255)
                    pixels[7] = (0, 0, 0)
                    pixels[8] = (0, 0, 0)
                    pixels[9] = (0, 0, 0)
                    resultado = False
                else:
                    pixels[0] = (0, 0, 0)
                    pixels[1] = (0, 0, 0)
                    pixels[2] = (0, 0, 0)
                    pixels[3] = (0, 0, 0)
                    pixels[4] = (0, 0, 0)
                    pixels[5] = (0, 0, 0)
                    pixels[6] = (0, 0, 0)
                    pixels[7] = (0, 0, 255)
                    pixels[8] = (0, 0, 255)
                    pixels[9] = (0, 0, 255)
                    resultado = True
        else:
            print("¡No hay riesgo detectado!")
            for i in range(3):
                pixels.fill(GREEN)
                pixels.show()

                time.sleep(0.05)

                pixels.fill(PIXELS_OFF)
                pixels.show()

                time.sleep(0.05)
    except:
        continue

    time.sleep(0.025)