check if a value exist in a model Django code example

Example 1: check django object exists

modelName.objects.filter(pk='id').exists()

Example 2: how to check if given primary key exists in django model

If using the object ---
try:
   obj = model1.objects.get(pk=20)
except DoesNotExist:
   ###do something####
    
Else ----
if model1.objects.filter(pk=20).exists():
   ###do something###
else:
  ###do otherthing###