﻿ 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.

Visual Presentation:

Sample Solution:

Python Code:

``````# Define a function 'remove_column' that removes a specified column from a nested list
def remove_column(nums, n):
# Iterate through the sublists in 'nums'
for i in nums:
# Delete the element at index 'n' in each sublist
del i[n]
# Return the modified 'nums' after removing the column
return nums

# Create a nested list 'list1'
list1 = [[1, 2, 3], [2, 4, 5], [1, 1, 1]]

# Set the column index 'n' to 0
n = 0

# Print a message indicating the original nested list
print("Original Nested list:")
# Print the contents of 'list1'
print(list1)

# Print a message indicating that the 1st column will be removed
print("After removing 1st column:")

# Call the 'remove_column' function with 'list1' and 'n' and print the result
print(remove_column(list1, n))

# Create another nested list 'list2'
list2 = [[1, 2, 3], [-2, 4, -5], [1, -1, 1]]

# Set the column index 'n' to 2
n = 2

# Print a message indicating the original nested list
print("\nOriginal Nested list:")
# Print the contents of 'list2'
print(list2)

# Print a message indicating that the 3rd column will be removed
print("After removing 3rd column:")

# Call the 'remove_column' function with 'list2' and 'n' and print the result
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]]
```

Flowchart:

Python Code Editor:

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