bash скрипт - специфичное удаление файлов

touch vzdump-qemu-100-2016_02_10-00_15_01.vma.gz  vzdump-qemu-100-2016_02_10-00_15_02.vma.gz  vzdump-qemu-100-2016_02_10-00_15_03.vma.gz  vzdump-qemu-200-2016_02_10-00_15_01.vma.gz

import glob
import itertools

files = glob.glob('*.vma.gz')

# vzdump-qemu-100-2016_02_10-00_15_03.vma.gz
files_with_ids = [(i, i.split('-')[2]) for i in files]

# vzdump-qemu-100-2016_02_10-00_15_03.vma.gz, 100
files_with_ids.sort(key=lambda x: x[1])


for k, g in itertools.groupby(files_with_ids, lambda x: x[1]):
    f = list(g);

    # 2 files only, nothing to delete
    if len(f) < 3: continue

    f.sort();

    # Drop the last 2 values
    first_files =f[:len(f) - 2]
    
    names_only = map(lambda x: x[0], first_files);
    
    for i in names_only:
        print(i)

vzdump-qemu-100-2016_02_10-00_15_01.vma.gz

#!/bin/bash

declare -A dumps_count
files=(vzdump-*)
for ((i = ${#files[@]} - 1; i >= 0; i--)); do
    f="${files[$i]}"
    IFS='-' read __ __ machine __ <<< "$f"
    (( ++dumps_count[$machine] > 2 )) \
        && rm -- "$f"
done