code: def _distance(self, op, vector):
      return Expression(lhs=self, op=op, rhs=self.to_value(vector))
  
file_path: pgvector-python/pgvector/peewee/__init__.py
imports: from peewee import Expression, Field, Value
  from ..utils import from_db, to_db
label_desc: Use image node_id 5 for calling the VectorField obj's underlying member method code with example usage: obj._distance(op, vector) and returns: Expression