====== Usage ======
<code bash>$ python TERC.py TERC.xml TERC.csv</code>
====== Code ======

<code python>
import sys
import csv, codecs, cStringIO
from lxml import etree

class UnicodeWriter:
    """
    A CSV writer which will write rows to CSV file "f",
    which is encoded in the given encoding.
    """

    def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
        # Redirect output to a queue
        self.queue = cStringIO.StringIO()
        self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
        self.stream = f
        self.encoder = codecs.getincrementalencoder(encoding)()

    def writerow(self, row):
        self.writer.writerow([s.encode("utf-8") for s in row])
        # Fetch UTF-8 output from the queue ...
        data = self.queue.getvalue()
        data = data.decode("utf-8")
        # ... and reencode it into the target encoding
        data = self.encoder.encode(data)
        # write to the target stream
        self.stream.write(data)
        # empty queue
        self.queue.truncate(0)

    def writerows(self, rows):
        for row in rows:
            self.writerow(row)

xml = etree.parse(open(sys.argv[1]))
catalog = xml.getroot()[0]
with open(sys.argv[2],'wb') as fp:
	writer = UnicodeWriter(fp)
	writer.writerows(map(lambda x: map(lambda x: x.text or '',x), catalog))
</code>
====== Wynik ======

Dla {{:it:terc.xml|TERC.xml}} z http://www.stat.gov.pl/broker/access/prefile/listPreFiles.jspa dało {{:it:terc.csv|TERC.csv}} o wiele lżej niż oficjalny [[http://www.stat.gov.pl/bip/389_112_PLK_HTML.htm|program do konwersji]].
~~DISCUSSION~~