[英]All combinations of a list of all lists iterating through a for loop
I am working on a program and I am having a bit of difficulty trying to figure about to make the for loop do what I would like.我正在开发一个程序,我在试图让 for 循环做我想做的事情时遇到了一些困难。
As of right now, the for statement goes through every single combination of all lists and makes 5 choices, that is right, I want 5 choices.截至目前,for 语句遍历所有列表的每一个组合并做出 5 个选择,没错,我想要 5 个选择。
However, it creates a lot of overlap, since I am adding all the lists together and picking 5 items.但是,它会产生很多重叠,因为我将所有列表添加在一起并选择 5 个项目。 I do get what I want, but along with many combinations I do not, since all I am doing is adding all 5 lists together, I want them to be picked independently.
我确实得到了我想要的东西,但是我没有得到许多组合,因为我所做的只是将所有 5 个列表加在一起,我希望它们被独立挑选。
I would like the for statement to only go through each list row by row, and pick all combinations, with no overlap.我希望 for 语句仅通过每个列表逐行显示 go,并选择所有组合,没有重叠。
from itertools import combinations
.
.
.
.
def playerpick():
P1 = [1,2,3,4,7]
P2 = [1,8,13,14,17,29]
P3 = [1,2,3]
P4 = [1,7,8,12,15]
P5 = [1,2,3,4]
all_lists = P1 + P2 + P3 + P4 + P5
for (a,b,c,d,e) in combinations(all_lists, 5):
pick1 = a
pick2 = b
pick3 = c
pick4 = d
pick5 = e
playerpick()
The output I want is something like this, pull each item out from each list, one at a time:我想要的 output 是这样的,从每个列表中拉出每个项目,一次一个:
output 1: [1,1,1,1,1]
output 2: [2,1,1,1,1]
output 3: [3,1,1,1,1]
output 4: [4,1,1,1,1]
output 5: [7,1,1,1,1]
output 6: [1,8,1,1,1](next combination)
output 7: [2,8,1,1,1]
output 8: [3,8,1,1,1]
output 9: [4,8,1,1,1]
output 10: [7,8,1,1,1]
output 11: [1,13,1,1,1](next combination)
output 12: [2,13,1,1,1]
...
Let me know if you have any questions, this is difficult to explain, I know.如果您有任何问题,请告诉我,这很难解释,我知道。
Since its a iterator, you can use next
:由于它是一个迭代器,您可以使用
next
:
In [240]: x = itertools.product(*a)
In [241]: next(x)
Out[241]: (1, 4, 7)
In [242]: next(x)
Out[242]: (1, 4, 8)
And so on.等等。
You can have this next
in your function which will yield one combination at a time.你可以在你的
next
中使用这个,它一次会产生一个组合。
This cartesian product shall do it in the order you want:此笛卡尔积应按您想要的顺序执行:
import itertools
import pprint
def cartesian_product(lists):
return list(itertools.product(*lists))
for list in [(P1,P2,P3,P4,P5)]:
print(list, '=>')
pprint(cartesian_product(list), indent=2)
The cartesian product has no duplicates unless your input lists do, if it's the case maybe think of using set() .笛卡尔积没有重复项,除非您的输入列表这样做,如果是这种情况,可能会考虑使用set() 。
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