Python/sorts/gnome_sort.py

from __future__ import print_function

def gnome_sort(unsorted):
    """
    Pure implementation of the gnome sort algorithm in Python.
    """
    if len(unsorted) <= 1:
        return unsorted
        
    i = 1
    
    while i < len(unsorted):
        if unsorted[i-1] <= unsorted[i]:
            i += 1
        else:
            unsorted[i-1], unsorted[i] = unsorted[i], unsorted[i-1]
            i -= 1
            if (i == 0):
                i = 1
                
if __name__ == '__main__':
    try:
        raw_input          # Python 2
    except NameError:
        raw_input = input  # Python 3
    
    user_input = raw_input('Enter numbers separated by a comma:\n').strip()
    unsorted = [int(item) for item in user_input.split(',')]
    gnome_sort(unsorted)
    print(unsorted)