哪个循环可以用来继续 while 循环？

Question

我想知道如何使用循环来压缩这段代码。它是 (i) 变量定义 (ii) while 循环条件 ...(iii) 变量增量

的重复序列

list_main = []
x1 = 1
while x1<= n:
    x2 = x1
    while x2 <= n:
        x3 = x2
        while x3 <= n:
#continue the sequence: x(i) = x(i-1) ; while x(i) <= n:
 
            list_ = [x1,x2,...]
            list_main.append(list_)
            x3 = x3 + 1
        x2 = x2 + 1
    x1 = x1 + 1

我想要这样的东西：

max_x = 10 #maximum number of 'x's
#code
list_ = [x1,x2,x3,x4,x5,x6,x7,x8,x9,x10]

编辑

如果“x”的数量是 2，n 是 5，那么我想要的输出，即 list_main 是

list_main = [[1,1],[1,2],[1,3],[1,4],[1,5],[2,2],[2,3],[2,4],[2,5],[3,3],[3,4],[3,5],[4,4],[4,5],[5,5]]

如果'x'的个数是3，n是3，那么我想要的输出是

list_main = [[1,1,1],[1,1,2],[1,1,3],[1,2,2],[1,2,3],[2,2,2],[2,2,3],[2,3,3],[3,3,3]]

Answer 1

正如中指出的，您的问题可以这样解决：

max_x = 10
n = 5
values = []
i = 1
while i <= n:
    list_values.append(i)
    i = i + 1
count = [max_x] * n
list_main = list(unique_combinations_from_value_counts(values,count,max_x))

哪个循环可以用来继续 while 循环？

Which loop can be used for continuing while loop?

python

sequence

while-loop