On 09/08/2015 09:37 PM, Stephen J. Turnbull wrote:
Oscar Benjamin writes:
ATM the colon separates the part of the format element that is interpreted by the format method to find the formatted object from the part that is passed to the __format__ method of the formatted object. Perhaps an additional colon could be used to separate the separator for when the formatted object is an iterable so that
'foo {name:<fmt>:<sep>} bar'.format(name=<expr>)I thought about a colon, but that loses if the objects are times. I guess that kills '/' and '-', too, since the objects might be dates. Of course there may be a tricky way to use these that I haven't thought of, or they could be escaped for use in <fmt>.
This seems to me to need a nested format spec. An outer one to format the whole list, and an inner one to format each item.
f"foo {', '.join(f'{x:inner_spec}' for x in iter):outer_spec}"
Actually this is how I'd rather write it.
"foo " + l.fmap(inner_spec).join(', ').fstr(outer_spec)
But sequences don't have the methods to write it that way.
l = range(10) "foo" + format(','.join(map(lambda x: format(x, '>5'), l)), '>50')
'foo 0, 1, 2, 3, 4, 5, 6, 7, 8, 9'
It took me a few times to get that right.
Cheers, Ron