box_message.py

UP_DOWN    = chr(9474)  # Character 9474 is '│'
LEFT_RIGHT = chr(9472)  # Character 9472 is '─'
DOWN_RIGHT = chr(9484)  # Character 9484 is '┌'
DOWN_LEFT  = chr(9488)  # Character 9488 is '┐'
UP_RIGHT   = chr(9492)  # Character 9492 is '└'
UP_LEFT    = chr(9496)  # Character 9496 is '┘'

def box_message(width, height, message):
	# Print top line:
	print(DOWN_RIGHT + (LEFT_RIGHT * (width - 2)) + DOWN_LEFT)

	for i in range(height - 2):
		if i == height // 2 - 1:
			# Print message:
			print(UP_DOWN + message.center(width - 2) + UP_DOWN)
		else:
			# Print empty line:
			print(UP_DOWN + (' ' * (width - 2)) + UP_DOWN)

	# Print bottom line:
	print(UP_RIGHT + (LEFT_RIGHT * (width - 2)) + UP_LEFT)

box_message(50, 5, 'Do not ignore this message!')
box_message(50, 3, 'It is very important!')

"""
Prints out:
┌────────────────────────────────────────────────┐
│                                                │
│          Do not ignore this message!           │
│                                                │
└────────────────────────────────────────────────┘
┌────────────────────────────────────────────────┐
│             It is very important!              │
└────────────────────────────────────────────────┘
"""