# Python: Sort unsorted numbers using non-parallelized implementation of odd-even transposition sort

## Python Search and Sorting : Exercise-36 with Solution

Write a Python program to sort unsorted numbers using non-parallelized implementation of odd-even transposition sort.

From Wikipedia:

In computing, an odd-even sort or odd-even transposition sort (also known as brick sort or parity sort) is a relatively simple sorting algorithm, developed originally for use on parallel processors with local interconnections. It is a comparison sort related to bubble sort, with which it shares many characteristics. It functions by comparing all odd/even indexed pairs of adjacent elements in the list and, if a pair is in the wrong order (the first is larger than the second) the elements are switched. The next step repeats this for even/odd indexed pairs (of adjacent elements). Then it alternates between odd/even and even/odd steps until the list is sorted.

**Sample Solution**:

**Python Code:**

```
def odd_even_transposition(arr_nums: list) -> list:
arr_size = len(arr_nums)
for _ in range(arr_size):
for i in range(_ % 2, arr_size - 1, 2):
if arr_nums[i + 1] < arr_nums[i]:
arr_nums[i], arr_nums[i + 1] = arr_nums[i + 1], arr_nums[i]
return arr_nums
nums = [4, 3, 5, 1, 2]
print("\nOriginal list:")
print(nums)
odd_even_transposition(nums)
print("Sorted order is:", nums)
nums = [5, 9, 10, 3, -4, 5, 178, 92, 46, -18, 0, 7]
print("\nOriginal list:")
print(nums)
odd_even_transposition(nums)
print("Sorted order is:", nums)
```

Sample Output:

Original list: [4, 3, 5, 1, 2] Sorted order is: [1, 2, 3, 4, 5] Original list: [5, 9, 10, 3, -4, 5, 178, 92, 46, -18, 0, 7] Sorted order is: [-18, -4, 0, 3, 5, 5, 7, 9, 10, 46, 92, 178]

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## Python: Tips of the Day

**The Zip() Function:**

>>> students = ('John', 'Mary', 'Mike') >>> ages = (15, 17, 16) >>> scores = (90, 88, 82, 17, 14) >>> for student, age, score in zip(students, ages, scores): ... print(f'{student}, age: {age}, score: {score}') ... John, age: 15, score: 90 Mary, age: 17, score: 88 Mike, age: 16, score: 82 >>> zipped = zip(students, ages, scores) >>> a, b, c = zip(*zipped) >>> print(b) (15, 17, 16)

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