A 'UnicodeEncodeError' occurs when trying to encode a Unicode string into a byte format that cannot represent all characters. Specify the appropriate encoding (e.g., UTF-8) or handle exceptions to manage such errors.

The 'UnicodeEncodeError' is a common exception in Python that arises when attempting to encode a Unicode string into a byte format that cannot represent all characters in the string. This typically occurs when using encodings that do not support certain characters, such as ASCII. To handle UnicodeEncodeErrors effectively, start by identifying the specific encoding you are using. UTF-8 is a widely supported encoding that can represent all Unicode characters and is often the preferred choice. When encoding, use the encode() method on the string, specifying 'utf-8' as the encoding, for example, my_string.encode('utf-8'). If you are uncertain about the characters in your string, consider using a try-except block to catch UnicodeEncodeErrors and handle them gracefully, perhaps by replacing unsupported characters with a placeholder using the errors parameter, like this: my_string.encode('utf-8', errors='replace'). By understanding and managing character encodings properly, you can effectively avoid and resolve UnicodeEncodeErrors in your Python applications.