Python .append() method is acting weirdly

Question

list = [[0,0]]
x = [0,0]
for i in range(5):
  x[0] += 1
  list.append(x)

expected result: [[1,0],[2,0],[3,0],[4,0],[5,0]] actual result: [[5,0],[5,0],[5,0],[5,0],[5,0]]

I have tried several things, but none seem to work.

I am open to any suggestions, I am trying to keep "x" as a list and would prefer to stay away from doing something like

x1 = x[0]
x2 = x[1]

You can use list comprehension `[(i+1, 0) for i in range(5)]` — cards, Sep 15 '21 at 14:54
Hy, Harmanation, try to use different names to variables. "list" is a built-in function. — Rutangaba, Sep 15 '21 at 15:13

score 0 · Answer 1 · edited Sep 15 '21 at 21:57

0

I think the problem is that it’s appending the list, not its contents, so it changes each time to the current value of the list(x). However, I’m really not sure what the exact problem is.

You could solve your problem by doing the following:

List=[[0,0]]
x=0
for I in range(5):
    x += 1
    list.append([x,0])

edited Sep 15 '21 at 21:57

Alex Waygood

6,304
3
24
46

answered Sep 15 '21 at 15:39

codelife

11
2

Python .append() method is acting weirdly

1 Answers1