def make_images(q):
eq = None
while True:
try:
(eq, hash) = q.get(timeout=1)
# create and save image
dir = MEDIA_ROOT + "/formulas/"
math2png([eq], dir, prefix=hash)
except Empty:
return
def __replace(m):
formula = m.group(1)
# hash the formula to make a unique url
h = hashlib.sha1()
h.update(formula)
# use hexdigest because digest produces possibly unsafe characters
hash = h.hexdigest()
# create and save image
dir = MEDIA_ROOT + "/formulas/"
math2png([formula], dir, prefix=hash)
return '<img src="%sformulas/%s1.png" alt="%s" />' \
% (MEDIA_URL, hash, formula)