'int' 对象没有属性 'ljust'

Question

import RPi.GPIO as GPIO
import SimpleMFRC522

reader = SimpleMFRC522.SimpleMFRC522()

try:
        text = int(raw_input('New data:'))
        print("Now place your tag to write")

        reader.write(text)
        print("Written")
finally:
        GPIO.cleanup()

在运行之后我有这个错误： AttributeError: 'int' 对象没有属性 'ljust'

Answer 1

去掉开头的int()转换：

text = raw_input('New data:')

...因为write()似乎不支持int作为参数：

reader.write(text) # here was the problem

'int' 对象没有属性 'ljust'

'int' object has no attribute 'ljust'

python

raspberry-pi3