code sample for http://stackoverflow.com/questions/34270130/jenkins-next-execution-plugin-how-to-get-details-through-rest-api

next_execution.py

#!/usr/bin/env python
import sys
import urllib2
import ssl
import lxml
import lxml.html
CTX = ssl.create_default_context()
CTX.check_hostname = False
CTX.verify_mode = ssl.CERT_NONE

def get_next_execution(url):
    """
    Get next execution list from jenkins website by parsing the html files
    
    return 
    [
    (datetime, jobname, url),
    ...
    ]
    
    Better to use JSON API, see issue: https://issues.jenkins-ci.org/browse/JENKINS-36210
    """    
    status = []

    try:
        html = urllib2.urlopen(url, context=CTX).read()
    except Exception,e:
        print "can't handle url '%s'" % url
        print "exception:" , e
        return status
    
    # use beautifulSoup4 instead of lxml is better, but avoid to use external module so far
    html2 = lxml.html.fromstring(html)
    div = html2.get_element_by_id("next-exec")
    result = lxml.html.tostring(div)
    tree = lxml.html.fromstring(result)  # ugly, but it works
    trs = tree.xpath('/html/body/div/div/table/tr')
    
    for tr in trs:
        tds     = tr.xpath("td")
        url     = tds[0].xpath("a/@href")[0]
        jobname   = tds[0].text_content()
        datetime = tds[1].text_content()
        status.append((datetime,  jobname, url))
    return status

if __name__== "__main__":
    url = "http://localhost:8080"
    print get_next_execution(url)