Question

我有一个列表列表，列表的第三个元素如下所示：

[
[[-0.8690725419806353, -0.08389000630791843, 0.7791382771921971, -0.21049789958222198], [-0.7007253732065291, 0.99458521937916, -0.5468526445976842, -0.3094246565483987]],

[[0.584256147560986, -0.5642927958007717, 0.21759356280359254, -0.06807820714092316], [-0.9779032680122586, 0.24546752298204022, 0.3751715219217411, -0.3146135836256405]],

[[-0.5398355639736792, 0.4502589522424809, 0.9293381308257145, -0.10657822991597832], [-0.6113730000884487, 0.9140987217023038, 0.251920069381135, 0.42646522786278185]],

[[-0.23324198103994065, 0.09276611770008003, -0.5799583815644322, 0.23100380680142574], [-0.679057196855118, -0.7221510084412031, 0.5840055827718216, 0.1973048386398748]],

[[0.43867699536415694, 0.27146397192191607, 0.7011538998707785, 0.8932145525910065], [0.09131111620483745, -0.14453114049637228, 0.6039831172025221, 0.7754730090802249]],

[[0.6802994135674767, -0.2327763818549724, -0.3282557058999114, -0.2724537918871204], [0.7147975426033915, -0.9615052173793399, -0.3368913254473691, -0.4013739657188222]]
]

上面的数据是列表的第3个元素，我想提取第3个元素中每个列表的第一个元素，所以最后我会得到类似的东西

list1 = [ -0.8690725419806353,0.584256147560986,-0.5398355639736792,-0.23324198103994065,0.43867699536415694,0.6802994135674767]

list2 = [ -0.08389000630791843,-0.5642927958007717,0.4502589522424809,0.09276611770008003,0.27146397192191607,-0.2327763818549724]

...等等

如何从我的数据结构中提取这些数据？（请注意，上面的数据已经是主根列表中的第三个元素，因此也需要从中提取它的[3]元素）

Answer 1

arr = [
    [[-0.8690725419806353, -0.08389000630791843, 0.7791382771921971, -0.21049789958222198], [-0.7007253732065291, 0.99458521937916, -0.5468526445976842, -0.3094246565483987]],
    [[0.584256147560986, -0.5642927958007717, 0.21759356280359254, -0.06807820714092316], [-0.9779032680122586, 0.24546752298204022, 0.3751715219217411, -0.3146135836256405]],
    [[-0.5398355639736792, 0.4502589522424809, 0.9293381308257145, -0.10657822991597832], [-0.6113730000884487, 0.9140987217023038, 0.251920069381135, 0.42646522786278185]],
    [[-0.23324198103994065, 0.09276611770008003, -0.5799583815644322, 0.23100380680142574], [-0.679057196855118, -0.7221510084412031, 0.5840055827718216, 0.1973048386398748]],
    [[0.43867699536415694, 0.27146397192191607, 0.7011538998707785, 0.8932145525910065], [0.09131111620483745, -0.14453114049637228, 0.6039831172025221, 0.7754730090802249]],
    [[0.6802994135674767, -0.2327763818549724, -0.3282557058999114, -0.2724537918871204], [0.7147975426033915, -0.9615052173793399, -0.3368913254473691, -0.4013739657188222]]
    ]

flat = [xss[0] for xss in arr]
transpose = list(zip(*flat))

结果：

[(-0.8690725419806353,
  0.584256147560986,
  -0.5398355639736792,
  -0.23324198103994065,
  0.43867699536415694,
  0.6802994135674767),
 (-0.08389000630791843,
  -0.5642927958007717,
  0.4502589522424809,
  0.09276611770008003,
  0.27146397192191607,
  -0.2327763818549724),
 (0.7791382771921971,
  0.21759356280359254,
  0.9293381308257145,
  -0.5799583815644322,
  0.7011538998707785,
  -0.3282557058999114),
 (-0.21049789958222198,
  -0.06807820714092316,
  -0.10657822991597832,
  0.23100380680142574,
  0.8932145525910065,
  -0.2724537918871204)]

Answer 2

使用此代码：

main = [
[[-0.8690725419806353, -0.08389000630791843, 0.7791382771921971, 
-0.21049789958222198], [-0.7007253732065291, 0.99458521937916, -0.5468526445976842, 
-0.3094246565483987]],

[[0.584256147560986, -0.5642927958007717, 0.21759356280359254, -0.06807820714092316], 
[-0.9779032680122586, 0.24546752298204022, 0.3751715219217411, -0.3146135836256405]],

[[-0.5398355639736792, 0.4502589522424809, 0.9293381308257145, -0.10657822991597832], 
[-0.6113730000884487, 0.9140987217023038, 0.251920069381135, 0.42646522786278185]],

[[-0.23324198103994065, 0.09276611770008003, -0.5799583815644322, 
0.23100380680142574], [-0.679057196855118, -0.7221510084412031, 0.5840055827718216, 
0.1973048386398748]],

[[0.43867699536415694, 0.27146397192191607, 0.7011538998707785, 0.8932145525910065], 
[0.09131111620483745, -0.14453114049637228, 0.6039831172025221, 0.7754730090802249]],

[[0.6802994135674767, -0.2327763818549724, -0.3282557058999114, -0.2724537918871204], 
[0.7147975426033915, -0.9615052173793399, -0.3368913254473691, -0.4013739657188222]]
]

ListNo = 1
index = 0

while (len(main[0][0]) > index):
    lists = []
    for l in main:
        lists.append(l[0][index]) 
    index += 1
    print("List "+str(ListNo)+ ": ",lists)
    ListNo += 1

index = 0
while (len(main[0][1]) > index):
    lists1 = []
    for l in main:
        lists1.append(l[1][index]) 
    index += 1
    print("List "+str(ListNo)+ ": ",lists1)
    ListNo += 1

输出：

List 1:  [-0.8690725419806353, 0.584256147560986, -0.5398355639736792, 
-0.23324198103994065, 0.43867699536415694, 0.6802994135674767]
List 2:  [-0.08389000630791843, -0.5642927958007717, 0.4502589522424809, 
0.09276611770008003, 0.27146397192191607, -0.2327763818549724]
List 3:  [0.7791382771921971, 0.21759356280359254, 0.9293381308257145, 
-0.5799583815644322, 0.7011538998707785, -0.3282557058999114]
List 4:  [-0.21049789958222198, -0.06807820714092316, -0.10657822991597832, 
0.23100380680142574, 0.8932145525910065, -0.2724537918871204]
List 5:  [-0.7007253732065291, -0.9779032680122586, -0.6113730000884487, 
-0.679057196855118, 0.09131111620483745, 0.7147975426033915]
List 6:  [0.99458521937916, 0.24546752298204022, 0.9140987217023038, 
-0.7221510084412031, -0.14453114049637228, -0.9615052173793399]
List 7:  [-0.5468526445976842, 0.3751715219217411, 0.251920069381135, 
0.5840055827718216, 0.6039831172025221, -0.3368913254473691]
List 8:  [-0.3094246565483987, -0.3146135836256405, 0.42646522786278185, 
0.1973048386398748, 0.7754730090802249, -0.4013739657188222]

提取列表列表的第一个元素

2 个答案: