TypeError: can only concatenate str (not "bytes") to str in Python

Dung Do Tien Oct 08 2021 155

Hello you guys, I am a newbie in Python and I'm also studying more about Python.

I have some lines of code and I want to mix bytes datatype with some other operator and bytes characters. My block of code as below:

symbol = b'j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004'

sum_text = '\xff' * 5 + symbol * 10

print(sum_text)

But I get an exception throw TypeError: can only concatenate str (not "bytes") to str when I run code above.

Traceback (most recent call last):
  File "main.py", line 3, in <module>
    sum_text = '\xff' * 5 + symbol * 10
TypeError: can only concatenate str (not "bytes") to str

And I am using python 3.8.2

Anyone can explain it to me? How can I solve it?

Thanks for any suggestions.

Have 2 answer(s) found.
  • W

    Watcharapong Jakkawannorasing Oct 08 2021

    You can't concat string with byte data type. I sure you miss it. Please change line code:

    sum_text = '\xff' * 5 + symbol * 10

    To

    sum_text = b'\xff' * 5 + symbol * 10

    And it work for you.

  • A

    Anand Pissey Oct 08 2021

    Change '\xff' to b'\xff' and it work for you.

    symbol = b'j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004'

sum_text = b'\xff' * 5 + symbol * 10

print(sum_text)

    #Output

    b'\xff\xff\xff\xff\xffj|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j
|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j|encoding: hexdump emoji.txt0000000 
f0 9f 98 ae 0000004j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j
|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j|encoding: hexdump emoji.txt0000000 f0 9f 98 ae 0000004j|encoding: hexdump 
emoji.txt0000000 f0 9f 98 ae 0000004'

    I hope it useful for you.

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