What is UnicodeDecodeError?

UnicodeDecodeError is an exception in Python that occurs when a byte sequence cannot be decoded into a string using a specified encoding. This typically happens when:

1. Invalid Byte Sequence: The byte sequence contains bytes that are not valid in the specified encoding.
2. Encoding Mismatch: The byte sequence is encoded in one encoding (e.g., Latin-1) but is being decoded using a different encoding (e.g., ASCII).

Example

Here's a simple example:

# Example of a UnicodeDecodeError
encoded_bytes = b'\x80'  # Invalid byte for ASCII
try:
    decoded_string = encoded_bytes.decode('ascii')
except UnicodeDecodeError as e:
    print(f"Error: {e}")

In this case, trying to decode b'\x80' with ASCII will raise a UnicodeDecodeError because 0x80 is not a valid ASCII byte.

Handling the Error

You can handle this error using a try-except block, as shown above, to gracefully manage situations where decoding fails.