﻿ Python: Remove a specified column from a given nested list - w3resource

# Python: Remove a specified column from a given nested list

## Python List: Exercise - 107 with Solution

Write a Python program to remove a specified column from a given nested list.

Sample Solution:

Python Code:

``````def remove_column(nums, n):
for i in nums:
del i[n]
return nums

list1 = [[1, 2, 3], [2, 4, 5], [1, 1, 1]]
n = 0
print("Original Nested list:")
print(list1)
print("After removing 1st column:")
print(remove_column(list1, n))

list2 = [[1, 2, 3], [-2, 4, -5], [1, -1, 1]]
n = 2
print("\nOriginal Nested list:")
print(list2)
print("After removing 3rd column:")
print(remove_column(list2, n))
```
```

Sample Output:

```Original Nested list:
[[1, 2, 3], [2, 4, 5], [1, 1, 1]]
After removing 1st column:
[[2, 3], [4, 5], [1, 1]]

Original Nested list:
[[1, 2, 3], [-2, 4, -5], [1, -1, 1]]
After removing 3rd column:
[[1, 2], [-2, 4], [1, -1]]
```

Pictorial Presentation:

Flowchart:

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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```