import urllib.request

from lxml import etree  # @UnresolvedImport


class WSParser():
    """ Parser for a web service """
    def __init__(self, url):
        self._url = url
        self._data = None

    @property
    def url(self):
        return self._url

    def parse(self):
        strxml = urllib.request.urlopen(self._url).read()
        self._data = etree.fromstring(strxml)

    def __iter__(self):
        if self._data is None:
            self.parse()
        return (node.attrib for node in self._data)

# OU
#
# from _io import BytesIO
# URL = 'http://localhost:2890/public/WsPDE.asmx/GetPDETitres'
#
# data = urllib.request.urlopen(URL).read()
#
# for _, element in etree.iterparse(BytesIO(data)):
#     print(element.attrib)

if __name__ == "__main__":

    ws_url = 'http://localhost:2890/public/WsPDE.asmx/GetPDETitres'
    for elt in WSParser(ws_url):
        print(elt)