How to insert data to django database from views.py file?

Your question is very unclear. You should probably go through the django-tutorial.

But sure you can insert data into the db from views. Assume you have a model called Foo:

models.py

class Foo(models.Model):
    name = models.CharField(max_length=100)

view.py

from .models import Foo

def some_name(request):
    foo_instance = Foo.objects.create(name="test")
    return render(request, 'some_name.html.html')