python yaml.dump bad indentation

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This ticket suggests the current implementation correctly follows the spec:

The “-”, “?” and “:” characters used to denote block collection entries are perceived by people to be part of the indentation. This is handled on a case-by-case basis by the relevant productions.

On the same thread, there is also this code snippet (modified to fit your example) to get the behavior you are looking for:

import yaml

class MyDumper(yaml.Dumper):

    def increase_indent(self, flow=False, indentless=False):
        return super(MyDumper, self).increase_indent(flow, False)

foo = {
    'name': 'foo',
    'my_list': [
        {'foo': 'test', 'bar': 'test2'},
        {'foo': 'test3', 'bar': 'test4'}],
    'hello': 'world',
}

print yaml.dump(foo, Dumper=MyDumper, default_flow_style=False)

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