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aaronmk
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# XML "function" nodes that evaluate their contents to text
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aaronmk
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import datetime
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86
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aaronmk
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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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aaronmk
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def alt(items):
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items = list(items)
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items.sort()
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return items[0][1] # value of lowest-numbered item
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86
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aaronmk
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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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111
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aaronmk
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year = float(items['year'])
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date = datetime.date(int(year), int(items.get('month', '1')),
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int(items.get('day', '1'))) + datetime.timedelta(round((year % 1.)*365))
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return date.strftime('%Y-%m-%d')
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86
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aaronmk
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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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aaronmk
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def namePart(items):
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items = dict(items)
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def to_parts(name): return items[name].split(' ')
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parts = []
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if 'first' in items: parts += to_parts('first')[:1]
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if 'last' in items: parts += to_parts('last')[-1:]
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if 'middle' in items: parts += to_parts('middle')[1:-1]
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return ' '.join(parts)
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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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aaronmk
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# Function names must be lowercase because name_of() returns name lowercased
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# Functions take arguments (doc, node)
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aaronmk
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funcs = {'_alt': alt, '_range': range_, '_avg': avg, '_date': date,
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'_name': name, '_namepart': namePart}
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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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aaronmk
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if name.startswith('_') and name in funcs: xml_dom.replace_with_text(doc,
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node, funcs[name](xml_dom.NodeTextEntryIter(node)))
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aaronmk
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else:
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for child in xml_dom.NodeElemIter(node): process(doc, child)
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