Python列表到元组

时间:2017-12-02 22:34:15

标签: python arrays

我有这个:

(([75, 0], [100, 0], [100, 370]), ([75, 0], [100, 370], [75, 370])) 

来自此:

 [(array([75,  0]), array([100,   0]), array([100, 370])), (array([75,  0]), array([100, 370]), array([ 75, 370]))]

我希望:

[(x1, y1, x2 , y2 ,x3 ,y3), (x1, y1, x2 , y2 ,x3 ,y3), ...] 

[(75, 0, 100, 0, 100, 370), (75, 0, 100, 0, 100, 370),.....]

感谢您的帮助!

4 个答案:

答案 0 :(得分:3)

您可以使用itertools.chain

import itertools
s = (([75, 0], [100, 0], [100, 370]), ([75, 0], [100, 370], [75, 370])) 
final_s = [list(itertools.chain.from_iterable(i)) for i in s]

输出:

[[75, 0, 100, 0, 100, 370], [75, 0, 100, 370, 75, 370]]

或在Python2中使用reduce

s = (([75, 0], [100, 0], [100, 370]), ([75, 0], [100, 370], [75, 370]))    
new_s = [reduce(lambda x, y:list(x)+list(y), i) for i in s]

输出:

[[75, 0, 100, 0, 100, 370], [75, 0, 100, 370, 75, 370]]

答案 1 :(得分:2)

您可以使用列表理解:

>>> t = (([75, 0], [100, 0], [100, 370]), ([75, 0], [100, 370], [75, 370])) 
>>> [tuple(sub for el in l for sub in el) for l in t]
[(75, 0, 100, 0, 100, 370), (75, 0, 100, 370, 75, 370)]

答案 2 :(得分:1)

易于理解的版本:

original = (([75, 0], [100, 0], [100, 370]), ([75, 0], [100, 370], [75, 370]))
final = []
for each_tuple in original:
    final_child_list = []
    for each_list in each_tuple:
        final_child_list.extend(each_list)
    final.append(final_child_list)

你会得到:

>>> final
[[75, 0, 100, 0, 100, 370], [75, 0, 100, 370, 75, 370]]
# if you prefer the inside element to be tuples
>>> [tuple(x) for x in final]
[(75, 0, 100, 0, 100, 370), (75, 0, 100, 370, 75, 370)]

可能有使用列表理解的较短版本,但可读性较差。

答案 3 :(得分:0)

从这个例子开始:

from operator import add
from functools import reduce

reduce(add, (x for x in [[1, 2], [3, 4]]))

输出:

  

[1,2,3,4]

现在只对元组中的每个元素执行此操作:

[tuple(reduce(add, x)) for x in data]

输出:

  

[(75,0,100,0,100,370),(75,0,100,370,75,370)]