UnicodeDecodeError: gbk codec can t decode byte 0xa2 in position 155: illegal multibyte sequence

This error occurs when a program tries to decode a string that contains characters outside of the supported character set. In this case, the program is trying to decode a string using the GBK codec, but it encounters a byte that is not a valid multibyte sequence in that encoding.

To resolve this error, you can try the following:

1. Check the input data: Make sure that the input data is valid and encoded in the expected character set. If necessary, convert the input data to the correct character set before decoding it.

2. Use a different codec: If the input data is not compatible with the GBK codec, try using a different codec that supports the characters in the input data.

3. Use a more robust decoding method: Try using a more robust decoding method, such as the codecs.decode() method, which can handle errors and fallback to a default encoding if necessary.

4. Check the file encoding: If the input data is coming from a file, make sure that the file is encoded in the correct character set. You may need to convert the file encoding before decoding the data.

Overall, the best way to avoid this error is to ensure that all input data is properly encoded and compatible with the chosen decoding method.