ListAndDictReorder.py

# 無重複數字
# input: name_list = [0, 1, 2, 3, 8]
for idx, num in enumerate(set(name_list)):
  if idx != num:
    name_list[idx] = idx
# output: name_list = [0, 1, 2, 3, 4]

# 有重複數字
# input: name_list = [0, 2, 2, 1, 6, 6]
for idx, num in enumerate(set(name_list)):
  if idx != num:
    item = np.where(np.asarray(name_list) == num)[0]
    for i in item:
      name_list[i] = idx
# output: name_list = [0, 2, 2, 1, 3, 3]

# input: idx_to_class = {0: 'good', 2: 'bad'}
for idx, key in enumerate(sorted(list(id_to_class))):
    if idx != key:
        idx_to_class[idx] = idx_to_class.pop(key)
# output: idx_to_class = {0: 'good', 1: 'bad'}

Reference: https://stackoverflow.com/a/6294744/13369757