code: def _extract_error_code(self, exception):
      return exception.errno
  
file_path: sqlalchemy/lib/sqlalchemy/dialects/mysql/cymysql.py
imports: from .base import BIT
  from .base import MySQLDialect
  from .mysqldb import MySQLDialect_mysqldb
  from ...None import util
label_desc: Use image node_id 3 for calling the MySQLDialect_cymysql obj's underlying member method code with example usage: obj._extract_error_code(exception) and returns: exception