The doctor has told my brother to do more exercise, but he won't do it, he's bone idle. You're bone idle – you've been at home all day and you're still in your pyjamas! My boyfriend's bone idle – he ...

缩进：表示程序的逻辑。指每行语句开始前的空白局域，用来表示Python程序之间的包含和层次关系。 变量：可以随时命名、赋值、使用。 命名：首字符不能是数字，中间不能出现空格，长度无限制。 必须带有小数部分，小数可以是0。 科学计算法使用字母 e 或 E ...