I have a string called message.

message = "Hello, welcome!\nThis is some text that should be centered!"

And I’m trying to center it for a default Terminal window, i.e. of 80 width, with this statement:

print('{:^80}'.format(message))

Which prints:

           Hello, welcome!
This is some text that should be centered!           

I’m expecting something like:

                                Hello, welcome!                                 
                   This is some text that should be centered!                   

Any suggestions?

You need to centre each line separately:

'\n'.join('{:^80}'.format(s) for s in message.split('\n'))

Here is an alternative that will auto center your text based on the longest width.

def centerify(text, width=-1):
  lines = text.split('\n')
  width = max(map(len, lines)) if width == -1 else width
  return '\n'.join(line.center(width) for line in lines)

print(centerify("Hello, welcome!\nThis is some text that should be centered!"))
print(centerify("Hello, welcome!\nThis is some text that should be centered!", 80))

<script src="https://repl.it/embed/IUUa/4.js"></script>