Iterasjon

De aktuelle dataene er ordnet i en XML-fil: results.xml

Kopier datafila og pythonkoden nedenfor og eksperimenter.

Eksempel

"""
 Iterating an xml-file (SAX-like)
 Reporting start and end for each element found
"""
from lxml import etree

"""
Just dropping out when error
"""
def testing1():
    xmlfile="../lxml/all_results.xml"
    try:
        for event, element in etree.iterparse(xmlfile,events=("start",)):
            print ("%s, %s, %s" %(event,element.tag,element.text))
    except:
        print('sorry')

"""
With errorhandling
"""
def testing2():
    xmlfile='../lxml/all_results_with_error.xml'
    etree.clear_error_log()
    try:
        for event, element in etree.iterparse(xmlfile,events=("start",)):
            print ("%s, %s, %s" %(event,element.tag,element.text))
    except etree.XMLSyntaxError as er:
        log=er.error_log.filter_from_level(etree.ErrorLevels.FATAL)
        print(log)

#testing1()
testing2()

testing1() produserer (starten)

start, IOC, 
	
start, OlympicGame, 
		
start, event, 
			
start, athlet, 
				
start, name, Dennis Mitchell
start, nation, USA
start, result, 10.04
start, athlet, 
				
start, name, Bruny Surin
start, nation, CAN
start, result, 10.09
start, athlet, 
 
...

testing2 produserer:

start, IOC, 
	
start, OlympicGame, 
		
start, event, 
			
start, athlet, 
				
start, name, Dennis Mitchell
start, nation, USA
start, result, 10.04
start, athlet, 
				
start, name, Bruny Surin
../lxml/all_results_with_error.xml:11:29:FATAL:PARSER:ERR_TAG_NAME_MISMATCH: 
Opening and ending tag mismatch: name line 11 and bame

siden vi har brukt en XML-fil som ikke er velformet