Hi all,
I'm trying to write a loop that will build a list of "template
strings".
My current implementation is *really slow*. It took 15 minutes to
finish. (final len(list) was about 16k entries.)
#combinations = 12 small template strings ie "{{ city }},
{{ state }}..."
#states = either a django model or a list of 50 states
#cities = either a django model of 400 cities or a smaller list of
cities.
templates = []
for c in combinations:
if len(states):
for state in states:
if type(geo) is City:
cities = state.city_set.all()
else:
cities = geo
for city in cities:
if type(city) is City:
city = city.city
templates.append(c.template.replace('{{ city }}',
city))
templates.append(c.template) #just in case there are no
cities
templates = [k.replace('{{ state }}',
state.state).replace('{{ state_abbr }}', state.abbreviation) for k in
templates]
elif len(geo):
for city in geo:
templates.append(c.template.replace('{{ city }}', city))
else:
#no cities or states so add roots
templates.append(c.template)
The final output needs to be a list of the templates combined with all
the states and cities (some templates will only have the city, some
only the state).
Any ideas how I can optimize this?
Thanks!
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