Replicate List by Replicating Each Element N Times

Suppose we have a list of n elements; we have to repeat each element in the list n number of times.

So, if the input is like nums = [1,5,8,3], then the output will be [1, 1, 1, 1, 5, 5, 5, 5, 8, 8, 8, 8, 3, 3, 3, 3]

To solve this, we will follow these steps −

• n := size of nums
• ret := a new list
• for each num in nums, do
  • ret := ret concatenate a list with n number of nums
• return ret

Example

Let us see the following implementation to get better understanding

def solve(nums):
   n = len(nums)
   ret = []
   for num in nums:
      ret += [num]*n
   return ret

nums = [1,5,8,3]
print(solve(nums))

Input

[1,5,8,3]

Output

[1, 1, 1, 1, 5, 5, 5, 5, 8, 8, 8, 8, 3, 3, 3, 3]