Below is a Python example that should be highlighted by the site’s highlighter (Rouge by default):

def greet(name: str) -> None:
    """Greet a user by name with a friendly message."""
    if not name:
        print("Hello, stranger!")
        return
    print(f"Hello, {name}!")

class Counter:
    def __init__(self):
        self.count = 0

    def inc(self):
        self.count += 1

if __name__ == '__main__':
    greet('Alice')
    c = Counter()
    for i in range(3):
        c.inc()
    print('count =', c.count)

If you see colored code tokens and line numbers (if enabled), the syntax highlighting works.