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Traceback (most recent call last): File "/piston/jobs/22662a3d-72b6-423a-b219-4b778f327c41/test.py", line 14, in <module> c[i[0]-1]=i[1]IndexError: list assignment index out of range

Question

Traceback (most recent call last): File "/piston/jobs/22662a3d-72b6-423a-b219-4b778f327c41/test.py", line 14, in <module> c[i[0]-1]=i[1]IndexError: list assignment index out of range

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Solution

The error message you're seeing, "IndexError: list assignment index out of range", is a common error in Python. It means you're trying to assign a value to an index that doesn't exist in the list.

Here's a step-by-step explanation:

  1. You have a list c and you're trying to assign a value i[1] to an index i[0]-1 of this list.
  2. The error occurs because the index i[0]-1 you're trying to access does not exist in the list c. In Python, list indices start at 0 and go up to one less than the length of the list. So if you have a list of length 5, the valid indices are 0, 1, 2, 3, and 4.
  3. To fix this error, you need to make sure that the index you're trying to access is within the valid range. You can do this by checking the length of the list using the len() function before trying to access an index.

Here's an example of how you can do this:

if i[0]-1 < len(c):
    c[i[0]-1] = i[1]
else:
    print("Index out of range")

This code will only try to assign the value i[1] to the index i[0]-1 if that index is within the valid range. If it's not, it will print a message saying "Index out of range".

This problem has been solved

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