Inserting list into list containing multiple list

Question

for knowledge purpose

Input:

    [[[[[], [], []]], ['trynda'], [[[], [], []]]], ['cait'], [[[[], [], []]], ['veigar'], [[[], [], []]]]]

Output:

    [[[[[], [x], []]], ['trynda'], [[[], [], []]]], ['cait'], [[[[], [], []]], ['veigar'], [[[], [], []]]]]

How do I add x into the 2nd list of the list of the list?

anon582847382 · Accepted Answer · 2014-04-13 14:32:48Z

3

Just use nested indices (as appropriate for a nested list):

original_list[0][0][0][1].append(x)  # 2nd of 1st of 1st of 1st.

That assumes x is a variable. Otherwise, use a string i.e. 'x'.

Demo:

>>> original_list = [[[[[], [], []]], ['trynda'], [[[], [], []]]], ['cait'], [[[[], [], []]], ['veigar'], [[[], [], []]]]]
>>> original_list[0][0][0][1].append('x')
>>> original_list
[[[[[], ['x'], []]], ['trynda'], [[[], [], []]]], ['cait'], [[[[], [], []]], ['veigar'], [[[], [], []]]]]
          ^

edited Apr 13, 2014 at 14:32

answered Apr 13, 2014 at 13:31

anon582847382

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anon582847382 · Accepted Answer · 2014-11-01 14:59:54Z

1

my_list[0][0][0][1].append(x)

Assuming that x contains a value. You'd want 'x' if it were a string.

edited Nov 1, 2014 at 14:59

anon582847382

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answered Apr 13, 2014 at 13:32

Luigi

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3 Comments

Alex Pertsev Over a year ago

Never use 'list' as variable name, because it is python reserved name.

Alex Pertsev Over a year ago

@thefourtheye It is not a builtin function, it is type, if you want to be fully precise =)

Luigi Over a year ago

It is both a type and a built-in function. In the context of my bad choice of variable name, I would've been overwriting the built-in function docs.python.org/2/library/functions.html#list

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