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data.lua
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data.lua
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--[[
Copyright 2014 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
require "env"
include "utils/operations.lua"
include "utils/stack.lua"
include "utils/symbolsManager.lua"
include "utils/variablesManager.lua"
include "utils/utils.lua"
local stack = Stack()
variablesManager = VariablesManager()
symbolsManager = SymbolsManager()
function to_data(code, var, output)
local x = {}
local y = {}
local output = string.format("%d.", output)
local input = ""
for i = 1, #code do
input = string.format("%s%s#", input, code[i])
end
input = string.format("%sprint(%s)@", input, var)
for j = 1, #input do
table.insert(y, 0)
table.insert(x, symbolsManager:get_symbol_idx(input:byte(j)))
end
for j = 1, #output do
table.insert(x, symbolsManager:get_symbol_idx(output:byte(j)))
table.insert(y, symbolsManager:get_symbol_idx(output:byte(j)))
end
local orig = string.format("%s%s", input, output)
return {x, y, orig}
end
function compose(hardness)
stack:clean()
variablesManager:clean()
local funcs = {}
local names = {}
for i, v in pairs(_G) do
if (string.find(i, "_opr") ~= nil) then
funcs[#funcs + 1] = v
names[#names + 1] = i
end
end
local code = {}
local hard, nest = hardness()
for h = 1, nest do
local f_idx = random(#funcs)
local f = funcs[f_idx]
local code_tmp, var_tmp, output_tmp = f(hardness)
for i = 1, #code_tmp do
code[#code + 1] = code_tmp[i]
end
stack:push({var_tmp, output_tmp})
end
local var, output = unpack(stack:pop())
return code, var, output
end
function get_operand(hardness)
if stack:is_empty() then
local eval = random(math.pow(10, hardness()))
local expr = string.format("%d", eval)
return expr, eval
else
return unpack(stack:pop())
end
end
function get_operands(hardness, nr)
local ret = {}
local perm = torch.randperm(nr)
for i = 1, nr do
local expr, eval = get_operand(hardness)
ret[perm[i]] = {expr=expr, eval=eval}
end
return unpack(ret)
end
function get_data(state)
make_deterministic(state.seed)
local len = state.len
local batch_size = state.batch_size
if state.data == nil then
state.data = {}
state.data.x = torch.ones(len, batch_size)
state.data.y = torch.zeros(len, batch_size)
end
local x = state.data.x
local y = state.data.y
local count = 0
io.write(string.format("Few exemplary newly generated " ..
"samples from the %s dataset:\n", state.name))
local idx = 1
local batch_idx = 1
local i = 0
while true do
data = to_data(compose(state.hardness))
input, target, orig = unpack(data)
if str_hash(orig) % 3 == state.kind then
count = count + #orig
if idx + #input > x:size(1) then
idx = 1
batch_idx = batch_idx + 1
if batch_idx > batch_size then
break;
end
end
for j = 1, #input do
x[idx][batch_idx] = input[j]
y[idx][batch_idx] = target[j]
idx = idx + 1
-- Added to take care of smaller state lens
if idx > x:size(1) then
idx = 1
batch_idx = batch_idx + 1
if batch_idx > batch_size then
break
end
end
end
if batch_idx > batch_size then
break
end
if (i <= 2) then
io.write("\tInput:\t")
local orig = string.format(" %s", orig)
orig = orig:gsub("#", "\n\t\t ")
orig = orig:gsub("@", "\n\tTarget: ")
io.write(orig)
io.write("\n")
io.write("\t-----------------------------\n")
i = i + 1
end
end
end
io.write("\n")
end
function load_data(state)
if state.currently_loaded_seed == state.seed then
return
else
state.currently_loaded_seed = state.seed
get_data(state)
end
end
function hardness_fun()
return 8, 4
end
if script_path() == "data.lua" then
make_deterministic(1)
print("Data verification")
for k = 1, 1000 do
code, var, output = compose(hardness_fun)
output = string.format("%d", output)
print("\n__________________\n")
local input = ""
for i = 1, #code do
input = string.format("%s%s\n", input, code[i])
end
input = string.format("%sprint(%s)", input, var)
print(string.format("Input: \n%s\n", input))
print(string.format("Target: %s", output))
lines = os.capture(string.format("python2.7 -c '%s'", input))
print(lines)
lines = string.sub(lines, 1, string.len(lines) - 1)
if lines ~= output then
print(string.format("\nERROR!\noutput from python: '%s', " ..
"doesn't match target output: '%s'", lines, output))
exit(-1)
end
end
print("\n__________________\n")
print("Successfully verified coherence of generated a " ..
"targets with python interpreter.")
end