How can I use Unicode in Python?

To use Unicode in Python, first ensure that you are using Python 3 or higher, as it has better support for Unicode than Python 2. Here are some ways to use Unicode in Python:

1. Use Unicode escape characters in your strings: To include Unicode characters in your string, use escape sequences in the form \uXXXX, where XXXX is the Unicode code point in hexadecimal. Example: print('\u03C0') will output the Greek letter Pi (π).
2. Use Unicode strings: In Python 3, you can define a string as a Unicode string by prefixing it with the letter ‘u’. Example: var = u'Hello \u03C0'.
3. Use built-in functions for converting between Unicode code points and characters: The built-in ord() function returns the Unicode code point of a character, while the chr() function returns the character corresponding to a Unicode code point. Example: print(ord('π')) will output the Unicode code point of the Greek letter Pi (960).
4. Use the UTF-8 encoding: UTF-8 is a popular encoding for Unicode text that uses one to four bytes to represent each character, depending on its code point value. In Python, you can encode and decode Unicode strings using the UTF-8 encoding using the encode() and decode() methods. Example: var = 'Hello π'.encode('utf-8').

Note that Python’s string type uses the Unicode Standard for representing text, so all text (str) is Unicode by default. It is also important to ensure that your source code files are saved in the UTF-8 encoding to avoid any encoding issues.