我想知道这个错误可能意味着什么:
PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed
我知道这与使用多核有关。我正在集群上运行我的程序,并在这行代码中使用 15 个线程:
gauss2 = PTSampler(ntemps, renwalkers, rendim, lnlike, lnprior, threads=15)
所讨论的采样器是在 http://dan.iel.fm/emcee/current/user/pt/
记录的并行回火采样器知道这个错误可能意味着什么吗?
该错误意味着您正在尝试腌制内置函数
FunctionType
...而不是函数本身。这可能是由于某个地方的编码错误而选择了函数的类而不是函数本身。
>>> import sys
>>> import pickle
>>> import types
>>> types.FunctionType
<type 'function'>
>>> try:
... pickle.dumps(types.FunctionType)
... except:
... print sys.exc_info()[1]
...
Can't pickle <type 'function'>: it's not found as __builtin__.function
>>> def foo(x):
... return x
...
>>> try:
... pickle.dumps(type(foo))
... except:
... print sys.exc_info()[1]
...
Can't pickle <type 'function'>: it's not found as __builtin__.function
>>> try:
... pickle.dumps(foo.__class__)
... except:
... print sys.exc_info()[1]
...
Can't pickle <type 'function'>: it's not found as __builtin__.function
>>> pickle.dumps(foo)
'c__main__\nfoo\np0\n.'
>>> pickle.dumps(foo, -1)
'\x80\x02c__main__\nfoo\nq\x00.'
如果你有一个
FunctionType
对象,那么你需要做的就是获取该类的实例之一——即像 foo
这样的函数。