emoji module names are not working in python3

I'm trying to use some emojis like these:

☺️ ☹️ ...

in python 3.

I have read some docs, and they said I can import "emoji" and use emoji module names and I found website that has a lot of module names. this is the link:

https://www.webfx.com/tools/emoji-cheat-sheet/

but none of them worked! (emoji installed by pip3)

Python 3.8.2 (default, Jul 16 2020, 14:00:26) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import emoji
>>> print(emoji.emojize(':joy:'))
:joy:
>>> print(emoji.emojize(':joy:'))
:joy:
>>> print(emoji.emojize(':laughing:'))
:laughing:
>>> print(emoji.emojize(':smile:'))
:smile:

I'm on ubuntu 20.04 LTS.

python3