# Python – Incremental and Cyclic Repetition of List Elements

Sometimes, while working with Python lists, we can have a problem in which we need to repeat elements K times. But we can have variations in this and have to repeat elements in cyclic and incremental way. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using loop + `enumerate()`
This is brute force way in which this task can be performed. In this, we iterate the elements and perform the required number of repetition using mod operator and multiplication logic.

 `# Python3 code to demonstrate  ` `# Incremental and Cyclic Repetition of List Elements ` `# using loop + enumerate() ` ` `  `# Initializing list ` `test_list ``=` `[``'g'``, ``'f'``, ``'g'``, ``'C'``, ``'S'``] ` ` `  `# printing original list ` `print``(``"The original list is : "` `+` `str``(test_list)) ` ` `  `# Initializing range  ` `i, j ``=` `2``, ``4` ` `  `# Incremental and Cyclic Repetition of List Elements ` `# using loop + enumerate() ` `res ``=` `[] ` `temp ``=` `list``(``range``(i, j ``+` `1``)) ` `for` `idx, ele ``in` `enumerate``(test_list): ` `    ``res.append(ele ``*` `temp[idx ``%` `len``(temp)]) ` `     `  `# printing result  ` `print` `(``"Repetition List is : "` `+` `str``(res)) `

Output :

```The original list is : ['g', 'f', 'g', 'C', 'S']
Repetition List is : ['gg', 'fff', 'gggg', 'CC', 'SSS']
```

Method #2 : Using `cycle() + loop + zip()`
The combination of these tasks can also be used to perform this task. In this, we iterate using loop and cycling and repetion is performed using cycle().

 `# Python3 code to demonstrate  ` `# Incremental and Cyclic Repetition of List Elements ` `# using cycle() + loop + zip() ` `from` `itertools ``import` `cycle ` ` `  `# Initializing list ` `test_list ``=` `[``'g'``, ``'f'``, ``'g'``, ``'C'``, ``'S'``] ` ` `  `# printing original list ` `print``(``"The original list is : "` `+` `str``(test_list)) ` ` `  `# Initializing range  ` `i, j ``=` `2``, ``4` ` `  `# Incremental and Cyclic Repetition of List Elements ` `# using cycle() + loop + zip() ` `res ``=` `[] ` `for` `k, l ``in` `zip``(cycle(``range``(i, j ``+` `1``)), test_list): ` `    ``res.append(k ``*` `l) ` `     `  `# printing result  ` `print` `(``"Repetition List is : "` `+` `str``(res)) `

Output :

```The original list is : ['g', 'f', 'g', 'C', 'S']
Repetition List is : ['gg', 'fff', 'gggg', 'CC', 'SSS']
```

My Personal Notes arrow_drop_up Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.