追加到嵌套列表

我正在使用嵌套列表来查找我创建的字典中的值。然后我想将找到的值附加到列表中。我不知道如何编码的问题是如何将附加的值保留在同一嵌套列表结构中？这是代码，其中最后一行我将值附加到空列表中。

#Creating a dictionary of FID: LU_Codes from external txt file
import sys, arcpy, string, csv

text_file = open("H:\SWAT\NC\FID_Whole.txt", "r")
Lines = text_file.readlines()
text_file.close()

FID_LU = map(string.split, Lines)
#print FID_LU
FID_GC_dict = dict(FID_LU)

Neighbors_file = open("H:\SWAT\NC\Sh_Neighbors2.txt","r")
Entries = Neighbors_file.readlines()
Neighbors_file.close()

Neighbors_List = map(string.split, Entries)

print Neighbors_List

#FID = [x[0] for x in Neighbors_List]
#print FID

gridList = []
for list in Neighbors_List:
    for item in list:
       #print FID_GC_dict[item]
       gridList.append(int(FID_GC_dict[item]))


 print gridList

这是邻居列表的输出（正确）：

[['0', '1', '11', '12', '13'], ['1', '0', '2', '12', '13', '14'], ['2', '1', '3', '13', '14', '15'], ['3', '2', '4', '14', '15', '16'], ['4', '3', '5', '15', '16', '17'], ['5', '4', '6', '16', '17', '18'], ['6', '5', '7', '17', '18', '19'], ['7', '6', '8', '18', '19', '20'], ['8', '7', '9', '19', '20', '21'], ['9', '8', '20', '21', '22'], ['10', '11']]

这是 gridList 的输出（不正确）：

[3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 2, 3, 3, 3, 4, 2, 2, 3, 3, 3, 2, 2, 2, 3, 3, 3, 2, 2, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4]

我希望 gridList 看起来像这样：

[[3, 3, 4, 4, 4], [3, 3, 3, 4, 4, 4], [3, 3, 3, 4, 4, 2], [3, 3, 3, 4, 2, 2], [3, 3, 3, 2, 2, 2], [3, 3, 3, 2, 2, 3], [3, 3, 3, 2, 3, 3], [3, 3, 3, 3, 3, 3], [3, 3, 3, 3, 3, 3], [3, 3, 3, 3, 3], [3, 4]]

任何帮助，将不胜感激。我是 python 新手......阅读帖子有帮助，但我正在努力解决这个问题。

Thanks!

列个临时清单，row。将内循环中的项目附加到row，然后在外循环中，将该行附加到gridList:

gridList = []
for nlist in Neighbors_List:
    row = []
    for item in nlist:
       row.append(int(FID_GC_dict[item]))
    gridList.append(row)

请注意，您还可以使用列表理解 here:

gridList = [[int(FID_GC_dict[item]) for item in nlist] 
            for nlist in Neighbors_List]

附言。最好不要命名变量list，因为它隐藏了同名的内置类型。