ipython并行推送自定义对象 [英] ipython parallel push custom object

问题描述

我无法将对象发送给直接查看工作者。
这是我想做的事情：

I am unable to send object to direct view workers. Here is what I want to do:

class Test:
  def __init__(self):
    self.id = 'ddfdf'

from IPython.parallel import Client
rc = Client()
dv = rc[:]
t = Test()
dv['t'] = t
print dv['t']

NameError: name 't' is not defined

如果我尝试推送pandas对象或任何构建对象，这将有效。
使用自定义对象的方法是什么？

This would work if I try to push pandas object or any of the build in objects. What is the way to do it with custom object?

我试过：

dv['Test'] = Test
dv['t'] = t
print dv['t']
UnpicklingError: NEWOBJ class argument isn't a type object

推荐答案

用于交互式定义的类（在 __ main__中），您需要推送类定义，或使用 dill 。但即便如此，这似乎也不适用于旧式类，这是IPython处理旧式类的一个错误[1]。如果您使用新式类，此代码可以正常工作：

For interactively defined classes (in __main__), you do need to push the class definition, or use dill. But even this doesn't appear to work for old-style classes, which is a bug in IPython's handling of old-style classes[1]. This code works fine if you use a new-style class:

class Test(object):
    ...

而不是旧式的。请注意，旧式类在Python 3中不可用。
无论如何总是使用新式类通常是一个好主意。

instead of on old-style class. Note that old-style classes are not available in Python 3. It's generally a good idea to always use new-style classes anyway.

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