example.py

for user_id in d.getUsers():
    filen = "out/%s.png" % user_id
    if os.path.exists(filen):
        continue
    i += 1
    if i > 20:
        exit(0) # we are not done yet
    # ... build the figure      
    fig.savefig(filen, dpi=300)
print "done..."
exit(1)