import requests
compounds = requests.get('http://rest.kegg.jp/list/compound')
for line in compounds.content.split('\n'):
cpdid = line.split('\t')[0]
compound = requests.get('http://rest.kegg.jp/get/' + cpdid)
f = open(cpdid[4:], 'w')
f.write(compound.content)
f.close()
print "finished"