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nodes.py

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class Node(object):

def __init__(self, tag, value, start_mark, end_mark):

self.tag = tag

self.value = value

self.start_mark = start_mark

self.end_mark = end_mark

def __repr__(self):

value = self.value

#if isinstance(value, list):

# if len(value) == 0:

# value = '<empty>'

# elif len(value) == 1:

# value = '<1 item>'

# else:

# value = '<%d items>' % len(value)

#else:

# if len(value) > 75:

# value = repr(value[:70]+u' ... ')

# else:

# value = repr(value)

value = repr(value)

return '%s(tag=%r, value=%s)' % (self.__class__.__name__, self.tag, value)

class ScalarNode(Node):

id = 'scalar'

def __init__(self, tag, value,

start_mark=None, end_mark=None, style=None):

self.tag = tag

self.value = value

self.start_mark = start_mark

self.end_mark = end_mark

self.style = style

class CollectionNode(Node):

def __init__(self, tag, value,

start_mark=None, end_mark=None, flow_style=None):

self.tag = tag

self.value = value

self.start_mark = start_mark

self.end_mark = end_mark

self.flow_style = flow_style

class SequenceNode(CollectionNode):

id = 'sequence'

class MappingNode(CollectionNode):

id = 'mapping'