為什么我這樣寫，輸出的是同樣的結果循環了循環了很多次：
L=range(1,101)
for i in L:
??? print L[6::7]
???
結果：
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
2016-03-16
這不是相當于從L中取元素賦值給i，然后再執行?print L[6::7]，取了100次，就執行print L[6::7]一百次
2016-04-20
L=range(1,101)
print L[6::7]