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#!/usr/bin/env ruby1.9.1
STDIN.set_encoding 'utf-8'
#shard_count_key = "__SHARD_COUNT__"
w = {}
c = {}
w.default = 0
c.default = 0
while line = STDIN.gets
key, val = line.split /\t/
w[key] += val.to_f
c[key] += 1.0
end
#shard_count = w["__SHARD_COUNT__"]
w.each_key { |k|
#if k == shard_count_key then next end
#if k == "__bias" then next end
puts "#{k}\t#{w[k]/c[k]}" #{w[k]/shard_count}"
}
#puts "#{shard_count_key}\t#{w[shard_count_key]}"
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