This function parses wml2 like is returned by http://nwisvaws02.er.usgs.gov/ogc-swie/wml2/uv/sos?request=GetObservation&featureID=01446500&offering=UNIT&observedProperty=00060&beginPosition=2013-02-15 The function takes a minidom object as input ("xml").

wml2_parse.py

'''
Only slighted modified from code provided by Laura De Cicco (USGS).

Laura De Cicco, A. Crosby

http://nwisvaws02.er.usgs.gov/ogc-swie/wml2/uv/sos?request=GetObservation&featureID=01446500&offering=UNIT&observedProperty=00060&beginPosition=2013-02-15
'''

from xml.dom import minidom, Node
import datetime

def parse_sos_GetObservations(xml):
    timestamp = []
    value = []

    parameter_nm = str(xml.getElementsByTagName("om:observedProperty")[0].attributes["xlink:title"].value)
    units = str(xml.getElementsByTagName("wml2:uom")[0].attributes["code"].value)
    name = str(xml.getElementsByTagName("gml:name")[0].firstChild.nodeValue)

    i = 0
    length = xml.getElementsByTagName("wml2:value").length
    for i in range(0,length):
        timeText = xml.getElementsByTagName("wml2:time")[i].firstChild.nodeValue
        timeText = timeText[:-6]
        time = datetime.datetime.strptime(timeText, '%Y-%m-%dT%H:%M:%S')
        timestamp.append(time)
        value.append(float(xml.getElementsByTagName("wml2:value")[i].firstChild.nodeValue))
        i += 1
    return timestamp, value, parameter_nm, units