How to stat AC for each population

[tpoterba]

ah, still need to fix that error message.

See here:

[BREAKING CHANGE] redesign of aggregator interface

the functions hl.agg.filter and hl.agg.explode have been changed. They now look like: hl.agg.filter(condition, hl.agg.collect(agg_expr)) hl.agg.explode(lambda elt: hl.agg.collect(elt), agg_array) They can be combined arbitrarily with each other and with hl.agg.group_by, but must always an aggregation. For example: hl.agg.filter(t.idx > 7, hl.agg.explode( lambda i: hl.agg.group_by(t.group, hl.agg.collect(t.x)), …