Unicode String Decorator: A Practical Guide for Python Developers

Build a Flexible Unicode String Decorator in 10 Minutes

What you’ll get (10-minute goal)

• A clear, minimal Python decorator that wraps function string outputs with customizable Unicode decorations.
• Examples for single-line and multi-line strings.
• Quick notes on Unicode handling and Python versions.

Decorator concept

Create a decorator that intercepts a function’s return value (assumed to be a string) and adds a border, prefix/suffix, or other Unicode ornament. Make it configurable via parameters so you can reuse it for different styles.

Ready-to-use decorator (Python 3.8+)

python
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from functools import wraps from typing import Callable 
def unicode_decorator(left: str = “╔”, right: str = “╗”, pad: str = ” “, top: str = “═”, bottom: str = “═”):
”“”     Wraps a function’s string output with a simple box using Unicode characters.     Usage: @unicode_decorator(left=‘╔’, right=‘╗’, pad=’ ‘)     “””
    def decorator(func: Callable):
        @wraps(func)
        def wrapper(*args, kwargs):
            result = func(*args, kwargs)
            if result is None:
                return result             s = str(result)
            lines = s.splitlines() or [””]
            width = max(len(line) for line in lines)
            top_line = f”{left}{top  (width + 2)}{right}“
            bottom_line = f”{left.replace(‘╔’,‘╚’)}{bottom  (width + 2)}{right.replace(‘╗’,‘╝’)}“
            middle = ” “.join(f”{left}{pad}{line.ljust(width)}{pad}{right}“ for line in lines)
            return ” “.join([top_line, middle, bottomline])
        return wrapper     return decorator 

python
 ffON2NH02oMAcqyoh2UU MQCbz04ET5EljRmK3YpQ CPXAhl7VTkj2dHDyAYAf” data-copycode=“true” role=“button” aria-label=“Copy Code”>Copy CodeCopied
@unicodedecorator(left=‘╔’, right=‘╗’, pad=’ ‘)
def greet(name):
    return f”Hello, {name}!”

print(greet(“Ava”))

Code
 ffON2NH02oMAcqyoh2UU MQCbz04ET5EljRmK3YpQ CPXAhl7VTkj2dHDyAYAf” data-copycode=“true” role=“button” aria-label=“Copy Code”>Copy CodeCopied
╔════════════╗ ╔ Hello, Ava! ╗ ╚════════════╝ 

python
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@unicode_decorator(left=‘┌’, right=‘┐’, pad=’ ‘)
def poem():
    return “Roses are red Violets are blue”
print(poem())