如何将字符串列表转换为列表列表

Question

在Python中，我该如何转换：

list a = [ 'i am going to America', 'i will come by tomorrow evening' ]

    into

list b = [ [i am going to America], [i will come by tomorrow evening] ]

Answer 1

您可以使用列表推导并生成另一个列表

list_a = [ 'i am going to America', 'i will come by tomorrow evening' ]
print(list_a) # ['i am going to America', 'i will come by tomorrow evening']

list_b = [[x] for x in list_a]
print(list_b) # [['i am going to America'], ['i will come by tomorrow evening']]

Answer 2

使用列表理解。

>>> a = [ 'i am going to America', 'i will come by tomorrow evening' ]
>>> [[x] for x in a]
[['i am going to America'], ['i will come by tomorrow evening']]

Answer 3

您需要将每个条目声明为列表，然后将其附加到main_list

list = ['i am going']
main_list.append(list)

尝试这个：

list = ['iam g', 'here']
 main_list = []
main_list.append(list)
 print main_list
output: [['iam g', 'here']]
 main_list.append(list)
 print main_list
output: [['iam g', 'here'], ['iam g', 'here']]