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43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
"""
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This is a pure python implementation of the insertion sort algorithm
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For doctests run following command:
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python -m doctest -v insertion_sort.py
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or
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python3 -m doctest -v insertion_sort.py
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For manual testing run:
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python insertion_sort.py
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"""
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def insertion_sort(collection):
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"""Pure implementation of the insertion sort algorithm in Python
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:param collection: some mutable ordered collection with heterogeneous
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comparable items inside
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:return: the same collection ordered by ascending
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Examples:
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>>> insertion_sort([0, 5, 3, 2, 2])
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[0, 2, 2, 3, 5]
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>>> insertion_sort([])
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[]
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>>> insertion_sort([-2, -5, -45])
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[-45, -5, -2]
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"""
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for loop_index in range(1, len(collection)):
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insertion_index = loop_index
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while insertion_index > 0 and collection[insertion_index - 1] > collection[insertion_index]:
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collection[insertion_index], collection[insertion_index - 1] = collection[insertion_index - 1], collection[insertion_index]
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insertion_index -= 1
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return collection
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if __name__ == '__main__':
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user_input = input('Enter numbers separated by a comma:\n').strip()
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unsorted = [int(item) for item in user_input.split(',')]
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print(insertion_sort(unsorted))
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