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--[[
Begin the lua pythonization.
--]]
local string_meta = getmetatable("")
string_meta.__add = function(v1, v2)
if type(v1) == "string" and type(v2) == "string" then
return v1 .. v2
end
return v1 + v2
end
local g_real_unpack = unpack or table.unpack
unpack = function(t)
if type(t) == "table" and t._is_list then
return g_real_unpack(t._data)
end
return g_real_unpack(t)
end
abs = math.abs
ascii = string.byte
chr = string.char
int = tonumber
str = tostring
function all(iterable)
for element in iterable do
if not element then
return false
end
end
return true
end
function any(iterable)
for element in iterable do
if element then
return true
end
end
return false
end
function bool(x)
if x == false or x == nil or x == 0 then
return false
end
if type(x) == "table" then
if x._is_list or x._is_dict then
return next(x._data) ~= nil
end
end
return true
end
function callable(x)
local x_type = type(x)
if x_type == "function" then
return true
end
if x_type == "table" then
local meta = getmetatable(x)
return type(meta.__call) == "function"
end
return false
end
function divmod(a, b)
local res = { math.floor(a / b), math.fmod(a, b) }
return unpack(res)
end
function len(t)
if type(t._data) == "table" then
return #t._data
end
return #t
end
function range(from, to, step)
assert(from ~= nil)
if to == nil then
to = from
from = 0
end
step = step or 1
local i = from
return function()
ret = i
if (step > 0 and i >= to) or (step < 0 and i <= to) then
return nil
end
i = i + step
return ret
end
end
function enumerate(t, start)
start = start or 0
local data = t
if t._is_list then
data = t._data
end
local i, v = next(data, nil)
return function()
local index, value = i, v
i, v = next(data, i)
if index == nil then
return nil
end
return index + start - 1, value
end
end
list = {}
setmetatable(list, {
__call = function(_, t)
local result = {}
result._is_list = true
result._data = {}
for _, v in ipairs(t) do
table.insert(result._data, v)
end
local methods = {}
methods.append = function(value)
table.insert(result._data, value)
end
methods.extend = function(iterable)
for value in iterable do
table.insert(result._data, value)
end
end
methods.insert = function(index, value)
table.insert(result._data, index, value)
end
methods.remove = function(value)
for i, v in ipairs(result._data) do
if value == v then
table.remove(result._data, i)
break
end
end
end
methods.pop = function(index)
index = index or #result._data
local value = result._data[index]
table.remove(result._data, index)
return value
end
methods.clear = function()
result._data = {}
end
methods.index = function(value, start, end_)
start = start or 1
end_ = end_ or #result._data
for i = start, end_, 1 do
if result._data[i] == value then
return i
end
end
return nil
end
methods.count = function(value)
local cnt = 0
for _, v in ipairs(result._data) do
if v == value then
cnt = cnt + 1
end
end
return cnt
end
methods.sort = function(key, reverse)
key = key or nil
reverse = reverse or false
table.sort(result._data, function(a, b)
if reverse then
return a < b
end
return a > b
end)
end
methods.reverse = function()
local new_data = {}
for i = #result._data, 1, -1 do
table.insert(new_data, result._data[i])
end
result._data = new_data
end
methods.copy = function()
return list(result._data)
end
local iterator_index = nil
setmetatable(result, {
__index = function(self, index)
if type(index) == "number" then
if index < 0 then
index = #result._data + index
end
return rawget(result._data, index + 1)
end
return methods[index]
end,
__newindex = function(self, index, value)
result._data[index] = value
end,
__call = function(self, _, idx)
if idx == nil and iterator_index ~= nil then
iterator_index = nil
end
local v = nil
iterator_index, v = next(result._data, iterator_index)
return v
end,
})
return result
end,
})
dict = {}
setmetatable(dict, {
__call = function(_, t)
local result = {}
result._is_dict = true
result._data = {}
for k, v in pairs(t) do
result._data[k] = v
end
local methods = {}
local key_index = nil
methods.clear = function()
result._data = {}
end
methods.copy = function()
return dict(result._data)
end
methods.get = function(key, default)
default = default or nil
if result._data[key] == nil then
return default
end
return result._data[key]
end
methods.items = function()
return pairs(result._data)
end
methods.keys = function()
return function(self, idx, _)
if idx == nil and key_index ~= nil then
key_index = nil
end
key_index, _ = next(result._data, key_index)
return key_index
end
end
methods.pop = function(key, default)
default = default or nil
if result._data[key] ~= nil then
local value = result._data[key]
result._data[key] = nil
return key, value
end
return key, default
end
methods.popitem = function()
local key, value = next(result._data)
if key ~= nil then
result._data[key] = nil
end
return key, value
end
methods.setdefault = function(key, default)
if result._data[key] == nil then
result._data[key] = default
end
return result._data[key]
end
methods.update = function(t)
assert(t._is_dict)
for k, v in t.items() do
result._data[k] = v
end
end
methods.values = function()
return function(self, idx, _)
if idx == nil and key_index ~= nil then
key_index = nil
end
key_index, value = next(result._data, key_index)
return value
end
end
setmetatable(result, {
__index = function(self, index)
if result._data[index] ~= nil then
return result._data[index]
end
return methods[index]
end,
__newindex = function(self, index, value)
result._data[index] = value
end,
__call = function(self, _, idx)
if idx == nil and key_index ~= nil then
key_index = nil
end
key_index, _ = next(result._data, key_index)
return key_index
end,
})
return result
end,
})
function staticmethod(old_fun)
local wrapper = function(first, ...)
return old_fun(...)
end
return wrapper
end
function operator_in(item, items)
if type(items) == "table" then
for v in items do
if v == item then
return true
end
end
elseif type(items) == "string" and type(item) == "string" then
return string.find(items, item, 1, true) ~= nil
end
return false
end
-- Lua classes
function class(class_init, bases)
bases = bases or {}
local c = {}
for _, base in ipairs(bases) do
for k, v in pairs(base) do
c[k] = v
end
end
c._bases = bases
c = class_init(c)
local mt = getmetatable(c) or {}
mt.__call = function(_, ...)
local object = {}
setmetatable(object, {
__index = function(tbl, idx)
local method = c[idx]
if type(method) == "function" then
return function(...)
return c[idx](object, ...)
end
end
return method
end,
})
if type(object.__init__) == "function" then
object.__init__(...)
end
return object
end
setmetatable(c, mt)
return c
end
--[[
End of the lua pythonization.
--]]
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