a=[1,2,3,4,5] a[1:4]=[1] print (a)

Question

How is this code working, what is the meaning of [1:4]
https://code.sololearn.com/cIScecIhlzaY/?ref=app
https://code.sololearn.com/cIScecIhlzaY/?ref=app

Answer 1

It gets a range and replaces it with new list of items. I changed value to 9 so it’s easy to see/understand.

a=[1,2,3,4,5]
a[1:4]=[9]
print (a)

Output:
[1, 9, 5]

1 is the starting index of the range, the 4 is the ending index of the range (but does not include the item in position 4. So the values 2,3,and 4 get replace with the new value(s).

Hope that helps.

Answer 2

https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2453/