oh i see. Thanks for the info. I will read about it.

This version and an equivalent full function do the exact same thing; this is just compressing it into one line. There's literally no advantage and it violates PEP-8 but some people seem to think it looks cool.

If some one would still find a duplicate, please log an issue instead.

rejected, no longer works on 3.11

performance tag is still missing :[

Got fixed

I see why your comment has a -73 rating now.

Thanks. :-/

Description need fixing.

See the description change in this comment, author mistakenly placed the missing qr in the wrong step

It should be:

After step 1, 2, 3:  
  s = cozylumxmoxgivesxsmartsquidwhoasksforjobpenx

After step 4:  
  s = co zy lu mx mo xg iv es xs ma rt sq ui dw ho as ks fo ri ob pe nx  

After step 5:  
  ciphertext pairs = dn wf rl im es gq et mo mq ef iu ks tr gv ds fo nk as er kd ai qr

After step 6:    
  ciphered text = dnwf rlimes gqetm omqef iukst rgv dsfo nka ser kda iqr 

Step 4: Break the given plaintext into pairs.

After Steps 1, 2, and 3:
s = cozylumxmoxgivesxsmartsquidwhoasksforjobpenx

After Step 4:
s = co zy lu mx mo xg iv es xs ma rt sq ui dw ho as ks fo ri ob pe nx qr

Where did the last qr come from?

Very funny...

I guess this can be closed.

the error comes from your code, and the output panel gives you enough information to find out what's wrong.

If I just disregard the spaghetti code given to us, I'm able to solve it :)