python中循环到理解列表的转换

我在使用理解列表编写以下循环时遇到问题

n = input( ' enter any number: ' )
a = []
for i in range(1, n+1):
    b = []
    for j in range(0, i):
        b.append( i + ((9 - j) * j) // 2)
    a.append(b)
print(a)

实际上，问题是打印

1  
2 6    
3 7 10  
4 8 11 13  
5 9 12 14 15  
  if n = 5

您可以使用：

In [10]: n = 5
In [11]: [[i+((9-j)*j)//2 for j in range(0, i)] for i in range(1, n+1)]
Out[11]: [[1], [2, 6], [3, 7, 10], [4, 8, 11, 13], [5, 9, 12, 14, 15]]

你是说像这样

alist = [[str(i + ((9 - j) * j) // 2) for j in range(i)] for i in range(1,n+1)]
print(*[' '.join(i) for i in alist],sep='\n')

注意：仅适用于python 3

在python 2中使用此选项：

for i in alist:
    print(' '.join(i))

你可以试试

In [1]: n = input( ' enter any number: ' )
enter any number: 10
In [2]: [[i + ((9 - j) * j) // 2 for j in range(0, i)] for i in range(1, n + 1)]
Out[2]:
[[1],
 [2, 6],
 [3, 7, 10],
 [4, 8, 11, 13],
 [5, 9, 12, 14, 15],
 [6, 10, 13, 15, 16, 16],
 [7, 11, 14, 16, 17, 17, 16],
 [8, 12, 15, 17, 18, 18, 17, 15],
 [9, 13, 16, 18, 19, 19, 18, 16, 13],
 [10, 14, 17, 19, 20, 20, 19, 17, 14, 10]]

In [3]:

您可以这样尝试：

total = int(input( ' enter any number: ' ))
output = [[p + ((9 - q) * q) // 2 for q in range(p)] for p in range(1,total+1)]


for ele in output:
    print(ele)

输出：

 enter any number: 3
 [1]
 [2, 6]
 [3, 7, 10]

---

你在期待什么？