Python Inserting Into 2D Array :list index out of range

Question

In the following python code I am trying to create a 2D array, delete an element, and insert a new one in that same specified position. I am able to delete an element with a specified position, however when trying to insert I am getting the error: IndexError: list index out of range.
Thanks for any help

tda = []
for i in range(0,100):
    if i % 10 == 0:
        col = []
        tda.append(col)
    col.append(random.randint(0,10))

del tda[1][1]
tda.insert([1][1],5)

insert() takes as an argument, the position you want to insert. You are passing a 2D position in the incorrect way. Maybe you wan to do tda[1].insert(1,5)?. — NAmorim
– NAmorim, Commented Feb 1, 2017 at 20:00

sundance · Accepted Answer · 2017-02-01 20:01:10Z

1

You're getting the error because you're passing [1][1] as a list index. List indexes must be integers. For example, you could do:

tda[1].insert([5,23,32,53,43])

To insert an entire new "row" into your 2D array. Instead of deleting and inserting however, you should just index into the location you want to change and update it directly:

tda[1][1] = 5

answered Feb 1, 2017 at 20:01

sundance

2,9554 gold badges23 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Minion Jim · Accepted Answer · 2017-02-01 20:04:01Z

0

Try replacing

tda.insert ([1] [1], 5)

with

col = tda [1]
col.insert (1, 5)

answered Feb 1, 2017 at 20:04

Minion Jim

1,28913 silver badges31 bronze badges

Collectives™ on Stack Overflow

Python Inserting Into 2D Array :list index out of range

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related