铁蟒蛇:如何将字符串追加到字节数组 [英] Iron python: How to append string to bytearray

问题描述

我有一个bytearray，我必须在其中添加一个数字作为四个字符串.例如14应该添加为"0014".

I have a bytearray to which I have to add a number as a four character string. i.g. 14 should be added as '0014'.

我尝试过:

id = 14
arr.append(bytearray(format(id, '04x')))

但是它导致: TypeError: unicode argument without an encoding

推荐答案

当从字符串转换为字节时，确实应该明确指定编码.这个答案也适用于python 3:

Really you should explicitly specify the encoding when converting to bytes from a string. This answer also works in python 3:

arr.extend(format(id, "04x").encode('ascii'))

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