Up "[Errno 5] Input/output error" 作成: 2021-04-03
更新: 2021-04-10

    つぎは，GoPiGo を障害物の前で停止させるプログラム ：
    obstacle_stop.py
    #!/usr/bin/env python from easygopigo3 import EasyGoPiGo3 from di_sensors.easy_distance_sensor import EasyDistanceSensor from time import sleep gpg = EasyGoPiGo3() my_sensor = EasyDistanceSensor() #Distance from obstacle where the GoPiGo should stop : 20cm distance_to_stop = 20 print "Press ENTER to start" #Wait for input to start raw_input() #Start moving gpg.forward() while True: #Find the distance of the object in front dist = my_sensor.read() #print("distance from object: {} cm".format(dist)) print "Dist:",dist,'cm' #If the object is closer than the "distance_to_stop" distance, stop the GoPiGo if dist < distance_to_stop: print "Stopping" #Stop the GoPiGo gpg.stop() break sleep(.1)


    しかしこれの実行は，繰り返されるうちに，つぎのエラーが現れてくる：
      [Errno 5] Input/output error
    この症状は，obstacle_stop.py の起動を重ねるごとに，ひどくなる。
    そして，起動もしなくなる：
      $ ./obstacle_stop.py [Traceback (most recent call last): File "./obstacle_stop.py", line 8, in <module> my_sensor = EasyDistanceSensor() File "/usr/local/lib/python2.7/dist-packages/DI_Sensors-1.0.0-py2.7.egg/di_sensors/easy_distance_sensor.py", line 56, in __init__ File "/usr/local/lib/python2.7/dist-packages/DI_Sensors-1.0.0-py2.7.egg/di_sensors/distance_sensor.py", line 28, in __init__ File "/usr/local/lib/python2.7/dist-packages/DI_Sensors-1.0.0-py2.7.egg/di_sensors/VL53L0X.py", line 126, in __init__ File "/usr/local/lib/python2.7/dist-packages/Dexter_AutoDetection_and_I2C_Mutex-0.0.0-py2.7.egg/di_i2c.py", line 220, in write_reg_8 File "/usr/local/lib/python2.7/dist-packages/Dexter_AutoDetection_and_I2C_Mutex-0.0.0-py2.7.egg/di_i2c.py", line 185, in transfer File "/usr/local/lib/python2.7/dist-packages/Dexter_AutoDetection_and_I2C_Mutex-0.0.0-py2.7.egg/di_i2c.py", line 469, in transfer IOError: [Errno 5] Input/output error

    python のインタラクティブシェルでテストしてみると，上のエラーは "EasyDistanceSensor()" の実行で発生する：
      >>> my_sensor = EasyDistanceSensor() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/dist-packages/DI_Sensors-1.0.0-py2.7.egg/di_sensors/easy_distance_sensor.py", line 56, in __init__ File "/usr/local/lib/python2.7/dist-packages/DI_Sensors-1.0.0-py2.7.egg/di_sensors/distance_sensor.py", line 28, in __init__ File "/usr/local/lib/python2.7/dist-packages/DI_Sensors-1.0.0-py2.7.egg/di_sensors/VL53L0X.py", line 126, in __init__ File "/usr/local/lib/python2.7/dist-packages/Dexter_AutoDetection_and_I2C_Mutex-0.0.0-py2.7.egg/di_i2c.py", line 220, in write_reg_8 File "/usr/local/lib/python2.7/dist-packages/Dexter_AutoDetection_and_I2C_Mutex-0.0.0-py2.7.egg/di_i2c.py", line 185, in transfer File "/usr/local/lib/python2.7/dist-packages/Dexter_AutoDetection_and_I2C_Mutex-0.0.0-py2.7.egg/di_i2c.py", line 469, in transfer IOError: [Errno 5] Input/output error
      エラーが出るタイミングは，一定しない。
      >>> my_sensor = EasyDistanceSensor()
      が通ることもある。
      しかし
      >>> read_distance = my_sensor.read()
      で，：
      >>> read_distance = my_sensor.read()
      'int' object is not iterable
      [Errno 5] Input/output error
      となったり，
      '>>> read_distance = my_sensor.read()
      '[Errno 5] Input/output error
      '[Errno 5] Input/output error
      '[Errno 5] Input/output error
      となったりする。