Pls how do I reverse a dictionary?

Question

For example:
_dict = { solo:4, learn:2, solearn: 5, Elijah:3, python:21}.
I'm trying to sort this in a way I'll get
new_dict = {21:python, 5:solearn, 4:solo, 3:Elijah, 2:learn}

So I tried to interchanged the dictionary in two ways but both failed
1. new_dict = dic(zip(_dict.values(), _dict.keys())).
2. new_dict = {}
for key, value in _dict.items():
new_dict[value] = item.

I was hoping to sort it later but both of the algorithms failed

Answer 1

Elijah Nwalozie

There is lots of ways to swap Key Value of dictionary.

https://code.sololearn.com/cyW0S7hPc9eV/?ref=app

Answer 2

You can do it this way!

a=sorted(_dict.items(),key=lambda x:x[1],reverse=True)

new_dict={i[1]:i[0] for i in a})

Answer 3

Calvin Thomas I'll try this too thanks

Answer 4

You can also use dictionary comprehension

https://code.sololearn.com/cDkQNzkcIGtn/?ref=app

Answer 5

Ipang OK: my bad ^^

Answer 6

I ᴀᴍ "Tɪᴍᴇ" I know now why my algorithm was wrong, some of the keys have the same value so when I swap them, since dictionaries must have distinct keys, it eliminates some of them instead of adding them up in the list

Answer 7

Elijah Nwalozie Here's a possible solution:

old_dict = {...} # All the items
new_dict = {a: (k:=[x for x in old_dict if old_dict[x] == a]) * (len(k) > 1) or k[0] for a in old_dict.values()}

# Hope this helps

Answer 8

Elijah Nwalozie

Yes dictionary do not allow duplicate keys that is why I have stored duplicate keys value in a list.