Q ： Why does Python print the formula or the functions "backward"?
A ： It's not really backward, it's "inside out." When you start breaking down the function into separate formulas and function calls you'll see how it works. Try to understand what I mean by "inside out" rather than "backward."
from ： https://learnpythonthehardway.org/book/ex21.html
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3pmtea Jan 25, 2017  1
-- 为什么输出的文本是按（与函数名出现的顺序）相反的顺序打印出来的？
-- 准确来说并不是反序，而是（按照函数的调用层次）从里向外的顺序 比如 31 行， what = add(age, subtract(height, multiply(weight, divide(iq, 2))))，函数出现的顺序（正序）是 add - sub - mult - divide ，而在实际执行代码时， python 先确定参数的值，然后才调用函数，这就导致了在最内层的 divide 会最先调用，所以就成了 inside-out |
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Newyorkcity OP @3pmtea 谢谢，理解了
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