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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def console_set_background_flag(con: tcod.console.Console, flag: int) -> None: """Change the default blend mode for this console. Args: con (Console):
 Any Console instance. flag (int):
 Blend mode to use by default. .. deprecated:: 8.5 Set :any:`Console.default_bg_blend` instead. """

    lib.TCOD_console_set_background_flag(_console(con), flag)