"访问列表列表中每个列表的第 n 个元素"

Question

I have a problem in python and one step I need to do is to access the second element of every list in a list of lists. The list is:

[(0, 'Gallery', 'PROPN', 'nsubj'), (1, 'unveils', 'VERB', 'root'), (2, 'interactive', 'ADJ', 'amod')]

[(0, 'A', 'DET' 'det'), (1 'Christmas' , 'PROPN', 'compound'), (2, 'tree' ,'NOUN', 'nsubjpass')]

Answer 1

when you are enumerating over the list in the for loop:

for word in words:
    pass // do something

Answer 2

word= [[(0, 'Gallery', 'PROPN', 'nsubj'), (1, 'unveils', 'VERB', 'root'), (2, 'interactive', 'ADJ', 'amod')],[(0, 'A', 'DET' 'det'), (1,'Christmas' , 'PROPN', 'compound'), (2, 'tree' ,'NOUN', 'nsubjpass')]]

[j[2] for i in word for j in i] ==> Outputs ['PROPN', 'VERB', 'ADJ', 'DETdet', 'PROPN', 'NOUN']

[j[1] for i in word for j in i] ==> Outputs ['Gallery', 'unveils', 'interactive', 'A', 'Christmas', 'tree']

Answer 3

you should try:

all_my_lists= [
    [(0, 'Gallery', 'PROPN', 'nsubj'), (1, 'unveils', 'VERB', 'root'), (2, 'interactive', 'ADJ', 'amod')],
    [(0, 'A', 'DET' 'det'), (1, 'Christmas' , 'PROPN', 'compound'), (2, 'tree' ,'NOUN', 'nsubjpass')]
]

for my_list in all_my_lists:
    for tup in my_list:
        print(tup[2])

Answer 4

Try this code:

`for sub_list_temp in list:

for temp_tuple in sub_list_temp:

    print(temp_tuple[2])

`