使用自定义 Torch class 序列化失败

Question

序列化可能会失败，创建的 class 对象包含 __pairs:

test = torch.class('test')
function test:__init()
  self.data = {}
end

function test:__pairs(...)
    return pairs(self.data, ...)
end

function test:get_data()
  print(self.data)
end

a = test.new()
a.data = {"asdasd"}
b = torch.serialize(a)
c = torch.deserialize(b)
print(torch.typename(c))
print(c:get_data())

以下returns：

test
nil

Answer 1

torch.serialization 后面的引擎位于 File-class. The File:writeObject us the key function. For the above example the action for a Torch class starts at line 201 中：

elseif typeidx == TYPE_TORCH then

类型在 File:isWritableObject 中标识。

也许可以实现元表功能 write but in the above example the problem was non-torch metatable function __pairs that should be __pairs__ (see torch.getmetatable):

test = torch.class('test')
function test:__init()
  self.data = {}
end

function test:__pairs__(...)
    return pairs(self.data, ...)
end

function test:get_data()
  print(self.data)
end

a = test.new()
a.data = {"asdasd"}
b = torch.serialize(a)
c = torch.deserialize(b)
print(torch.typename(c))
print(c:get_data())

这给出了预期的：

test    
{
  1 : "asdasd"
}

使用自定义 Torch class 序列化失败

Serialization fails with custom Torch class

torch