downloadkgml.py

import requests

ORGANISM = "hsa"

pathways = requests.get('http://rest.kegg.jp/list/pathway/' + ORGANISM)
for line in pathways.content.split('\n'):
    pathwayid = line.split('\t')[0].replace('path:', '')
    kgml = requests.get('http://rest.kegg.jp/get/' + pathwayid + '/kgml')
    f = open(pathwayid + '.xml', 'w')
    f.write(kgml.content)
    f.close