# Python: Compute the average of n^{th} elements in a given list of lists with different lengths

## Python List: Exercise - 197 with Solution

Write a Python program to compute the average of n^{th} elements in a given list of lists with different lengths.

**Sample Solution:**

**Python Code:**

```
import itertools as it
nums = [[0, 1, 2],
[2, 3, 4],
[3, 4, 5, 6],
[7, 8, 9, 10, 11],
[12, 13, 14]]
print("Original list:")
print(nums)
def get_avg(x):
x = [i for i in x if i is not None]
return sum(x, 0.0) / len(x)
result = map(get_avg, it.zip_longest(*nums))
print("\nAverage of n-th elements in the said list of lists with different lengths:")
print(list(result))
```

Sample Output:

Original list: [[0, 1, 2], [2, 3, 4], [3, 4, 5, 6], [7, 8, 9, 10, 11], [12, 13, 14]] Average of n-th elements in the said list of lists with different lengths: [4.8, 5.8, 6.8, 8.0, 11.0]

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**Flowchart:**

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**Previous:** Write a Python program to move a specified element in a given list.

**Next:** Write a Python program to compare two given lists and find the indices of the values present in both lists.

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## 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

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