code: def __init__(
      self, *expressions, m=None, ef_construction=None, **kwargs
  ):
      self.m = m
      self.ef_construction = ef_construction
      super().__init__(*expressions, **kwargs)
  
imports: from django.contrib.postgres.operations import CreateExtension
  from django.contrib.postgres.indexes import PostgresIndex
  from django.db.models import Field, FloatField, Func, Value
  import numpy
  from .forms import VectorFormField
  from ..utils import from_db, to_db
label_desc: Use image node_id 1 to create a new HnswIndex object from inherited base classes: PostgresIndex with example: obj = HnswIndex()