列表允许在一个变量中存储多个值。例如,我们希望将用户的 ID 存储在变量中,因此我们的列表将如下所示:user_id user_ids = [11, 22, 33, 44, 55] 在列表中允许混合不同类型的对象,换句话说,列表是异构集合。
1. The__main__守卫:脚本执行控制 提示:使用if __name__ == "__main__":守护来控制脚本直接运行时的代码执行。 优点: 确保某些代码仅在直接执行脚本时运行,而不是在导入时运行。
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Neurons that secrete the neuropeptide orexin help mice decide between exercise and snacking.