code: def connect(self):
      return psycopg2.connect(dsn=dsn)
  
file_path: psycopg2/tests/test_psycopg2_dbapi20.py
imports: from .None import dbapi20
  from .None import dbapi20_tpc
  from .testutils import skip_if_tpc_disabled
  import unittest
  import psycopg2
  from .testconfig import dsn
label_desc: Use image node_id 1 for calling the Psycopg2TPCTests obj's underlying member method code with example usage: obj.connect() and returns: psycopg2