Add if statement for output template

[revolter]

I currently use this: -o "D:\Movies\youtube-dl\%(playlist_index)s.%(title)s-%(id)s.%(ext)s" but whenever I download a video that's not in a playlist, it gets saved with a filename that starts with NA.<title>.

It would help if it was possible to check if some variable exists, like -o "D:\Movies\youtube-dl\%if(playlist_index)s{%(playlist_index)s.}%(title)s-%(id)s.%(ext)s"

[jaimeMF]

I think that the "easiest" way to implement this is using a template library (like Jinja2). I undestand that it could be useful, but I don't know if others would agree to implement it with an external library (making it optional of course).

[revolter]

@jaimeMF, I understand the concern. I solved it using an if in my own python script.