incomplete dict constructor

[dvd@…]

Hi all,

I'm puzzled by a strange behavior of yaml

If you run the attached script you obtain an output like this:

{'date': '732638',
'fields': {},
'guid': '0000010f153544cf8a314808007f000000000001',
'expiration': None}
{'date': '732638',
'fields': {'': {}, 'it': {'title': 'Hello World'}},
'guid': '0000010f153544cf8a314808007f000000000001',
'expiration': None}

*Please note the 'fields' value (I wrap the output to increase legibility)*

the first line is printed inside this custom constructor function:

def news_constructor(loader, node):
    nodes = loader.construct_mapping(node)
    print nodes
    return nodes

the second line (the correct one) is the print of the return values of this function

Can you help me or explain me this strange behavior?

[dvd@…]

the test script

[xi]

It's not a bug, it's a feature. :)

Dictionaries and other mutable structures are not constructed fully in order to support recursive structures.

If you still want to obtain a complete object, use the (undocumented) deep parameter of construct_mapping:

    nodes = loader.construct_mapping(node, deep=True)