[chaley]

Thinking about this a bit more, I think that the best solution is

program:
	contains(approximate_formats(), 'EPUB|MOBI|PDF', 'red', '')

Why better? Because:

• As I said abive, GPM templates are compiled so the custom column doesn't have that advantage.
• There is no list manipulation in this template.
• It is general enough to return different values for yes and no.

Note that this template suffers from the same problem as the function example I gave. It will return true if a format string contains one of the values. For example, it will match ORIGINAL_EPUB as well as EPUB. If you don't want this then you could use the following:

program:
	list_re(approximate_formats(), ',', '^(EPUB|MOBI|PDF)$', 'red');

but this is significantly slower.

Alternatively you could do the same thing as a custom template function, which will be faster because it isn't as general as list_re.

def evaluate(self, formatter, kwargs, mi, locals, color):
	import re
	fmt_data = mi._proxy_metadata.db_approx_formats
	for f in fmt_data:
		if re.search('^(EPUB|MOBI|PDF)$', f):
			return color
	return ''