Python3 and appending to bytearray-CodePudding

I can't get what I am doing wrong... The test code is:

#!/usr/bin/python3
data = bytearray(b'\x01\x04\x00\x84\x00\x02')
crc  = "0xe231"
data.append(int(crc[4:6], 16))
data.append(int(crc[2:4], 16))
print(data)

Then what I get is:

bytearray(b'\x01\x04\x00\x84\x00\x021\xe2')

Why append is not working? It should be "\x01\x04\x00\x84\x00\x02\x31\xe2"

CodePudding user response：

As @Tomerikoo has pointed out in a comment, the \x31 byte that you think you are missing is actually there. It's just not printed as \x31 but simply as 1 because Pythons prints readable bytes in the readable representation. \x31 is the character 1 in ASCII encoding.

CodePudding user response：

Funny... The print just confused me. I tried:

#!/usr/bin/python3
data = bytearray(b'\x01\x04\x00\x84\x00\x02')
crc  = "0xe231"
data.append(int(crc[4:6], 16))
data.append(int(crc[2:4], 16))
print(data)
x = 0
while x < 8:
   print(hex(data[x]))
   x  = 1

Then I could see that the array is correct. Thanks!