Grant Edwards <grant.b.edwards@gmail.com> wrote:

On 2024-02-16, Chris Green via Python-list <python-list@python.org> wrote:

...

I'm looking for a simple way to make NaN values output as something like '-' or even just a space instead of the string 'nan'.

It would probably help if you told us how you're "outputting" them now (the Python feaatures/functions used, not the actual output format).

Are you using f-strings, the % operator, str.format(), or ??

I would be tempted to try monkey-patching the float class to override the __format__ method. I have no idea what side effects that might have, or if it's even used by the various formatting mechanisms, so you might end up scraping bits off the walls...

It's using f'{...}' at the moment. -- Chris Green ·