﻿ Python: Find the index of the last element in the given list that satisfies a testing function - w3resource

# Python: Find the index of the last element in the given list that satisfies a testing function

## Python List: Exercise - 235 with Solution

Write a Python program to find the index of the last element in the given list that satisfies the provided testing function.

Sample Solution:

Python Code:

``````def find_last_index(lst, fn):
return len(lst) - 1 - next(i for i, x in enumerate(lst[::-1]) if fn(x))

print(find_last_index([1, 2, 3, 4], lambda n: n % 2 == 1))
```
```

Sample Output:

```2
```

Flowchart:

## Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

What is the difficulty level of this exercise?

Test your Python skills with w3resource's quiz

﻿

## Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

```print(1000 // 300)
print(1000 / 300)```

Output:

```3
3.3333333333333335```