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86
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aaronmk
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# XML "function" nodes that evaluate their contents to text
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import xml_dom
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def map_items(func, items):
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return [(name, func(value)) for name, value in items]
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def range_(items):
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items = dict(map_items(float, items))
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return str(items['to'] - items['from'])
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def avg(items):
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count = 0
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sum_ = 0.
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for name, value in map_items(float, items):
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count += 1
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sum_ += value
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return str(sum_/count)
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def date(items):
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items = dict(items)
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90
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aaronmk
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return '-'.join([items['year'], items.get('month', '1'),
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86
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aaronmk
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items.get('day', '1')])
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89
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aaronmk
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def name(items):
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items = dict(items)
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return ' '.join([items['first'], items['last']])
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86
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aaronmk
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# Function names must start with _ to avoid collisions with real tags
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# Functions have take arguments (doc, node)
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89
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aaronmk
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funcs = {'_range': range_, '_avg': avg, '_date': date, '_name': name}
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86
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aaronmk
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def process(doc, node=None):
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if node == None: node = doc.documentElement
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name = xml_dom.name_of(node)
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if name in funcs: xml_dom.replace_with_text(doc, node,
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funcs[name](xml_dom.NodeTextEntryIter(node)))
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else:
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for child in xml_dom.NodeElemIter(node): process(doc, child)
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