basic python / sort messy dictionary

I have eg p_deck={3:12, 5:23, 6:8, 9:47, 10:18}
and need p_deck={0:12, 1:23, 2:8, 3:47, 4:18}
what is the most efficient way of doing it?
I tried:

p_deck={3:12, 5:23, 6:8, 9:47, 10:18}
p_keys_list=[]
p_values_list=[]
p_length=0

def order():
    global p_keys_list
    global p_values_list
    global p_length
    p_keys_list=p_deck.keys()
    p_values_list=p_deck.values()
    p_length=len(p_deck)
    p_deck={}
    for i in p_length:
        p_deck[i]={p_keys_list[i]:p_values_list[i]}
    return

But this results in error. It could be that you can solve this but then, is this method of trying to tease a dictionary apart and then reform it more orderly too unwieldy? I can’t seem to find a FAQ that matches this basic level as I am a newbie.

>Solution :

p_deck={3:12, 5:23, 6:8, 9:47, 10:18}
p_keys_list=[]

# create a list out of your dictionary using the first element of the list as the key
for i in p_deck.keys():
    p_keys_list.append([i, p_deck[i]])

# sort p_keys_list
p_keys_list.sort(key=lambda x: x[0])

# transform it back into a dictionary
p_deck = dict(p_keys_list)