from sqlalchemy.engine import create_engine
engine = create_engine('bigquery://')

engine.execute('SELECT FORMAT("%f", 1.0)')

  File "<stdin>", line 1, in <module>
  File "/home/data/sqlalchemy/engine/base.py", line 2237, in execute
    return connection.execute(statement, *multiparams, **params)
  File "/home/data/sqlalchemy/engine/base.py", line 1003, in execute
    return self._execute_text(object_, multiparams, params)
  File "/home/data/sqlalchemy/engine/base.py", line 1172, in _execute_text
    ret = self._execute_context(
  File "/home/data/sqlalchemy/engine/base.py", line 1316, in _execute_context
    self._handle_dbapi_exception(
  File "/home/data/sqlalchemy/engine/base.py", line 1514, in _handle_dbapi_exception
    util.raise_(exc_info[1], with_traceback=exc_info[2])
  File "/home/data/sqlalchemy/util/compat.py", line 182, in raise_
    raise exception
  File "/home/data/sqlalchemy/engine/base.py", line 1276, in _execute_context
    self.dialect.do_execute(
  File "/home/data/sqlalchemy/engine/default.py", line 593, in do_execute
    cursor.execute(statement, parameters)
  File "/home/data/google/cloud/bigquery/dbapi/_helpers.py", line 255, in with_closed_check
    return method(self, *args, **kwargs)
  File "/home/data/google/cloud/bigquery/dbapi/cursor.py", line 166, in execute
    formatted_operation = _format_operation(operation, parameters=parameters)
  File "/home/data/google/cloud/bigquery/dbapi/cursor.py", line 448, in _format_operation
    return _format_operation_dict(operation, parameters)
  File "/home/data/google/cloud/bigquery/dbapi/cursor.py", line 422, in _format_operation_dict
    return operation % formatted_params
TypeError: must be real number, not dict