strange data bag result

node conf

"gearbox": {
      "data_bags": {
        "pypi": [
          "gearbox"
        ]
      },
      "apps": [
        "pypi"
      ],
      "artifact_bucket": "s3_ops"
    }
  }

output1

chef > node["gearbox"]["data_bags"].keys
 => ["pypi"] 

chef > node["gearbox"]["data_bags"].values
 => [["gearbox"]] 


chef > node["gearbox"]["data_bags"].each do |k, v|
chef > print "k=#{k}\n"
chef ?> print "v=#{v}"
chef ?> end
k=pypi
v=["gearbox"] => ["pypi"] 

output2

chef > databags ||= { }
 => {} 
chef > node["gearbox"]["encrypted_data_bags"].to_hash.each do |k,v|
chef >   databags[k] = v.map do |args|
chef >     Chef::EncryptedDataBagItem.load(*args).to_hash
chef ?>   end
chef ?> end
 => {} 
chef > node["gearbox"]["data_bags"].to_hash.each do |k,v|
chef >   databags[k] = v.map do |args|
chef >     data_bag_item(*args).to_hash
chef ?>   end
chef ?> end
ArgumentError: wrong number of arguments (1 for 2)
	from /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.12.0/lib/chef/mixin/language.rb:238:in `data_bag_item'
	from (irb):9:in `block (2 levels) in irb_binding'
	from (irb):8:in `map'
	from (irb):8:in `block in irb_binding'
	from (irb):7:in `each'
	from (irb):7
	from /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.12.0/lib/chef/shef.rb:73:in `block in start'
	from /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.12.0/lib/chef/shef.rb:72:in `catch'
	from /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.12.0/lib/chef/shef.rb:72:in `start'
	from /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.12.0/bin/shef:34:in `<top (required)>'
	from /usr/bin/shef:19:in `load'
	from /usr/bin/shef:19:in `<main>'