# -*- noplot -*-
# print png to standard out
# usage: python print_stdout.py > somefile.png

import sys
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt

plt.plot([1, 2, 3])

if sys.version_info[0] >= 3:
    plt.savefig(sys.stdout.buffer)
else:
    plt.savefig(sys.stdout)