How I vertically align my LaTeX on my Django-based blog

latex_render.py

import tempfile
import sys
import os
import hashlib
import shutil
import re
from subprocess import Popen, PIPE

pattern = re.compile(r'\$(.*?)\$')
pattern2 = re.compile(r'\[`(.*?)`\]', re.DOTALL)
depthmatch = re.compile(r'\[\d depth=(\d+)\]')

def wrap_formula(txt):
	return r"""
\documentclass{article} 
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage[active,textmath]{preview}
\usepackage{bm}
\pagestyle{empty}
\begin{document}
%(txt)s
\end{document}
	""" % locals();

def render_formula(formula, folder):
    hash = hashlib.md5(formula).hexdigest()
    if os.path.exists(os.path.join(folder, hash + ".png")):
        f = open(os.path.join(folder, hash + "_baseline.txt"), 'r')
	baseline = f.readline()
	f.close()
	return (hash + ".png", baseline)
 
    tempdir = tempfile.mkdtemp()
    curpath = os.getcwd()
    os.chdir(tempdir)
 
    f = file('formula.tex', 'w')
    f.write(wrap_formula(formula))
    f.close()
 
    status = os.system("latex --interaction=nonstopmode formula.tex > /dev/null 2>&1")
    assert 0==status, tempdir
 
    proc = Popen(["dvipng", "-T", "tight", "-x", "1200", "-z", "9", "-bg", "transparent", "formula.dvi", "-o", "formula.png", "--depth"], stdout=PIPE)
    result = proc.communicate()[0]
    depth = depthmatch.search(result).group(1)
    status = proc.returncode
    assert 0==status, tempdir
 
    os.chdir(curpath)
 
    shutil.copyfile(os.path.join(tempdir, "formula.png"), os.path.join(folder, hash + ".png"))
    f = open(os.path.join(folder, hash + "_baseline.txt"), 'w')
    f.write(depth)
    f.close()
    shutil.rmtree(tempdir)
    
    return (hash+".png", depth)

def formatter(text):

   def replacement(s):
	sg = s.group()
	tup = render_formula(sg, "/home/flebron/sites/fedelebron.com/static/latex/")
	return "<img src=\"/static/latex/"+tup[0]+"\" style=\"vertical-align: -"+str(tup[1])+"pt;\" alt=\""+sg+"\">"

   def replacement2(s):
	sg = s.group()[2:-2]
	form = r'\begin{math}' + sg + r'\end{math}'
	tup = render_formula(form, "/home/flebron/sites/fedelebron.com/static/latex/")
	return "<div class='block_tex'><img src=\"/static/latex/"+tup[0]+"\" style=\"vertical-align: -"+str(tup[1])+"pt;\" alt=\""+sg+"\"></div>"

   text = pattern.sub(replacement, text)
   text = pattern2.sub(replacement2, text)
	
   return text