Dynamically add lookup field suffix to lookup field - django

Question

I currently have this pretty standard code block in my views.py.
statsign is a form value, as well as statinput.
My model field I want to filter my queryset players by is called nba_avg_rating
if statsign == '>=' and len(statinput) > 0:
players = players.filter(nba_avg_rating__gte=float(statinput)).order_by(sort)
elif statsign == '<=' and len(statinput) > 0:
players = players.filter(nba_avg_rating__lte=float(statinput)).order_by(sort)
elif statsign == '=' and len(statinput) > 0:
players = players.filter(nba_avg_rating__exact=float(statinput)).order_by(sort)
As you can see, currently my logic checks the statsign for a condition, filters by model field + the suffix, i.e. >= would result in filtering by nba_avg_rating__gte, so on and so forth.
My goal is to make this a dynamic process, in which I consolidate this process into one line. I have a field lookup dictionary like so
field_lookup = {
'>=': '__gte',
'<=': '__lte',
'=': '__exact'
}
And then I iterate through, appending the suffix to the field name, in some code like below.
for item in field_lookup.items():
if statsign == item[0] and len(statinput) > 0:
players = players.filter((nba_avg_rating + item[1])=float(statinput)).orderby(sort)
Now obviously the above code doesn't work, because nba_avg_rating is an expression. I can concatenate the suffix to nba_avg_rating as a string and then wrap it in eval, but alas, I then can't set the expression =flost(statinput)
Any thoughts on what I can do here?
Thanks

Answer 1

According to Daniel Answer.
You can do something like:
if statsign == '>=':
statsign = 'gte'
elif statsign == '<=':
statsign = 'lte'
elif statsign == '=':
statsign = 'exact'
if len(statinput) > 0:
kwargs = {
'{0}__{1}'.format('nba_avg_rating', statsign): float(statinput),
}
Person.objects.filter(**kwargs).orderby(sort)