'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

This error occurs when a string contains a Unicode escape sequence (\U) that is not properly formatted. The error message specifically indicates that the escape sequence is truncated, which means that it is missing some of the required digits.

To fix this error, you need to ensure that all Unicode escape sequences in your string are properly formatted. This means that they should have exactly eight digits following the \U, and each digit should be a valid hexadecimal character (0-9, A-F). If any of the digits are missing or are not valid, you will see the 'unicodeescape' codec error.

Here is an example of a properly formatted Unicode escape sequence:

my_string = '\U0001F601'

This represents the Unicode character U+1F601, which is the "grinning face with smiling eyes" emoji. Note that the escape sequence has exactly eight digits following the \U, and each digit is a valid hexadecimal character.

If you are encountering this error in your code, you should check for any strings that contain Unicode escape sequences and ensure that they are properly formatted. Alternatively, you can use a raw string literal (prefixing the string with an "r") to disable the interpretation of escape sequences.