Twitter List => Custom Audience

get_audience.rb

require 'twitter'
require 'csv'


handle = ARGV[0]
list   = ARGV[1]

client = Twitter::REST::Client.new do |config|
  config.consumer_key        = "YOUR KEY"
  config.consumer_secret     = "YOUR SECRET"
  config.access_token        = "YOUR ACCESS TOKEN"
  config.access_token_secret = "YOUR ACCESS TOKEN SECRET"
end

list = client.list_members(handle, list, {:limit => 5000})


CSV.open("audience.csv", "w") do |csv|
  list.each do |u|
    csv << [u.id.to_s, u.name]
  end  
end