OK, if you put one print more you can find a stupid thing I do. Up vote for first one to spot it.

""" demonstrating simple selection sort with prints"""

data = [64, 25, 12, 25, 22, 11, 62]

for current in range(len(data)-1):
    min_value_index = current
    print('Sorted: %s, Checking: %s' % (data[:current],data[current:]))
    # min_value_index = current, does not need to check that -> + 1
    for index, d in enumerate(data[current + 1:], current + 1):
        #print(index, min_value_index)
        if data[min_value_index] > d:
            min_value_index = index
    if min_value_index != current:
        data[current], data[min_value_index] = data[min_value_index], data[current]
    else:
        print('No swap needed')

print('\nReady result:')
print(data)