Getting instance of current in django site admin

[Krish]

I have following code in my admin.py

class PackageForm(forms.ModelForm):

activity = forms.CharField(required=False)

class Meta:

model = Package

class PackageAdmin(AjaxSelectAdmin):

form = PackageForm

admin.site.register(Package, PackageAdmin)

So while editing package, I want to change certain value of Package object. how can I do this?

[Derek]

You have not supplied enough information to make this an answerable question.   What is not happening that you expect should be happening?