w3resource

Python: Create a list taking alternate elements from a given list

Python List: Exercise - 120 with Solution

Write a Python program to create a list taking alternate elements from a given list.

Sample Solution:

Python Code:

def alternate_elements(list_data):
    result=[]
    for item in list_data[::2]:
        result.append(item)
    return result 
colors = ["red", "black", "white", "green", "orange"]
print("Original list:")
print(colors)
print("List with alternate elements from the said list:")
print(alternate_elements(colors))
nums = [2,0,3,4,0,2,8,3,4,2]
print("\nOriginal list:")
print(nums)
print("List with alternate elements from the said list:")
print(alternate_elements(nums))

Sample Output:

Original list:
['red', 'black', 'white', 'green', 'orange']
List with alternate elements from the said list:
['red', 'white', 'orange']

Original list:
[2, 0, 3, 4, 0, 2, 8, 3, 4, 2]
List with alternate elements from the said list:
[2, 3, 0, 8, 4]

Flowchart:

Flowchart: Create a list taking alternate elements from a given list.

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.

Previous: Write a Python program to check if a substring presents in a given list of string values.
Next: WWrite a Python program to find the nested lists elements which are present in another list.

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