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https://issues.apache.org/jira/browse/LIBCLOUD-705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14546486#comment-14546486
]
Samuel Marks commented on LIBCLOUD-705:
---------------------------------------
Sounds good to me. In the meantime I've hacked together a solution to turn the
Node into a dictionary (for JSON):
```
from types import (DictType, ListType, TupleType, BooleanType, FloatType,
StringType,
UnicodeType, IntType, NoneType, LongType, MethodType,
ClassType)
# Types which can be easily serialised
normal_types = (DictType, ListType, TupleType, BooleanType, FloatType,
StringType, UnicodeType, IntType, NoneType, LongType)
def is_instance_method(obj):
"""Checks if an object is a bound method on an instance.
From: http://stackoverflow.com/a/1260881
"""
if not isinstance(obj, MethodType):
return False # Not a method
if obj.im_self is None:
return False # Method is not bound
if issubclass(obj.im_class, type) or obj.im_class is ClassType:
return False # Method is a classmethod
return True
node_to_dict = lambda node: {
attr: {'driver': (lambda s: s[s.find("'") +
1:s.rfind("'")])(str(type(getattr(node, attr)))),
'extra': _extra_to_dict(getattr(node, attr))}.get(attr,
getattr(node, attr))
for attr in dir(node)
if not attr.startswith('_') and not is_instance_method(getattr(node, attr))
}
def _extra_to_dict(extra):
extra = {
attr: getattr(extra, attr)
for attr in dir(extra)
if not attr.startswith('_') and not is_instance_method(getattr(extra,
attr))
and type(getattr(extra, attr)) in normal_types
}
for key in ('secret', 'key'):
extra.pop(key, None)
if 'network_interfaces' in extra:
extra['network_interfaces'] = [{'name': interface.name, 'id':
interface.id}
for interface in
extra['network_interfaces']]
return extra
```
> Pickling of Nodes isn't supported - TypeError: a class that defines __slots__
> without defining __getstate__ cannot be pickled
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: LIBCLOUD-705
> URL: https://issues.apache.org/jira/browse/LIBCLOUD-705
> Project: Libcloud
> Issue Type: Wish
> Components: Compute
> Reporter: Samuel Marks
> Labels: features
>
> TypeError: a class that defines __slots__ without defining __getstate__
> cannot be pickled.
> Class is libcloud.compute.base.Node.
> Use case: pushing nodes created in libcloud into a queue for processing with
> other tools
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