compose, compose_left should allow you to name the composition

[uriva]

When debugging code that has use of compose, e.g.

my_func = toolz.compose(stage3, stage2, stage1)

And encountering an exception it might be hard to know where it came from, especially if stageX is itself a composition of elementary functions like map, filter etc'.

If we could somehow do my_func = toolz.compose(stage1, stage2, stage3, name="do_something"), and have exceptions return the line where the composition was done, that could be useful.

[mentalisttraceur]

Following the pattern in #472 and #463 , do you want to also close this old issue, since gamla solves this too?

[uriva]

yes ty