想请问一下如何以for循环个数当作变量写成函数 效果类似于: def what_I_want(number_loop): if number_loop == 2: for i in range(3): for j in [i,i+1]: print(j) elif number_loop == 3: for i in range(3): for j in [i,i+1]: for k in [j,j+1]: print(k) ... 也就是说,输入任意正整数 n,他会帮我 做n次for loop,且下一层的iterator是由上一层的element而来 也就是树状图的概念,但是每一层长下去的子枝是根据该母枝而定 谢谢解惑~~