code: def test_binary_format_correct(self):
      embedding = np.array([1.5, 2, 3])
      res = conn.execute(
          "SELECT %b::vector::text", (embedding,)
      ).fetchone()[0]
      assert res == "[1.5,2,3]"
  
file_path: pgvector-python/tests/test_psycopg.py
imports: import numpy
  from pgvector.psycopg import register_vector, register_vector_async
  import psycopg
  import pytest
label_desc: Use image node_id 5 for calling the TestPsycopg obj's underlying member method code with example usage: obj.test_binary_format_correct() without return types