How can I insert values of a list into a nested list?

Question

I have nested list like this:

ll =
[[[0, 0.01655718859584843],
  [1, 0.03777621092166489],
  [2, 0.02162311536578436],
  [3, 0.02907007584458954]],
 [[0, 0.011912058415296719],
  [1, 0.07967490411502279],
  [2, 0.04067120278932331],
  [3, 0.05439173103552319]]]

I want to insert the entries the second list:

uu =
[4577911, 4577821]

into the index 0 of the corresponding sublist.

So into the first sublist of ll I want to insert the first entry of uu like this:

[[[4577911, 0, 0.01655718859584843],
  [4577911, 1, 0.03777621092166489],
  [4577911, 2, 0.02162311536578436],
  [4577911, 3, 0.02907007584458954]],
 [[4577821, 0, 0.011912058415296719],
  [4577821, 1, 0.07967490411502279],
  [4577821, 2, 0.04067120278932331],
  [4577821, 3, 0.05439173103552319]]]

However my code delivers weird results

tu = ([[[u + x] for x in t] for t in ll for u in uu])

How can I do this right?

Rakesh · Accepted Answer · 2020-02-27 13:20:03Z

2

Using nested list comprehension with zip

Ex:

ll = [[[0, 0.01655718859584843],
  [1, 0.03777621092166489],
  [2, 0.02162311536578436],
  [3, 0.02907007584458954]],
  [[0, 0.011912058415296719],
  [1, 0.07967490411502279],
  [2, 0.04067120278932331],
  [3, 0.05439173103552319]]]

uu = [4577911, 4577821]

print([[[i] + k for k in j] for i, j in zip(uu, ll)])

Output:

[[[4577911, 0, 0.01655718859584843],
  [4577911, 1, 0.03777621092166489],
  [4577911, 2, 0.02162311536578436],
  [4577911, 3, 0.02907007584458954]],
 [[4577821, 0, 0.011912058415296719],
  [4577821, 1, 0.07967490411502279],
  [4577821, 2, 0.04067120278932331],
  [4577821, 3, 0.05439173103552319]]]

answered Feb 27, 2020 at 13:20

Rakesh

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