from sympy import preview
from io import BytesIO
import cairosvg, time, os


def get_png(tex):
	buf = BytesIO()
	preview(tex, output = "svg", viewer = "BytesIO", outputbuffer = buf)
	buf.seek(0)

	fname = "/tmp/{}".format(time.time())

	cairosvg.svg2png(bytestring=buf.read(), parent_widht=500, parent_height=500, write_to=fname)

	buf.seek(0)

	with open(fname, "rb") as fin:
		buf.write(fin.read())
	with open(fname, "rb") as fin:
		with open("test.png", "wb") as fout:
			fout.write(fin.read())
		
	os.unlink(fname)

	buf.seek(0)

	return buf