UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbe in position 0: invalid start byte

This error usually occurs when trying to decode a text file that contains non-UTF-8 encoded characters. UTF-8 is a character encoding format that can represent all possible characters in Unicode, but if the file contains characters in a different encoding, it will result in a decoding error.

To resolve this error, you can try the following:

1. Specify the correct encoding: If you know the encoding of the file, you can specify it explicitly when opening the file. For example, if the file is encoded in ISO-8859-1, you can open it like this:

with open('file.txt', encoding='iso-8859-1') as f:
    content = f.read()

2. Use a different encoding: If you don't know the encoding of the file or if it contains a mix of different encodings, you can try using a different encoding to decode it. Some common encodings are latin1, cp1252, and utf-16. For example:

with open('file.txt', encoding='latin1') as f:
    content = f.read()

3. Ignore errors: If you don't care about the characters that can't be decoded, you can ignore the errors and continue reading the file. For example:

with open('file.txt', errors='ignore') as f:
    content = f.read()

Note that ignoring errors can result in data loss, so use it with caution.