How can I use UID command in IMAPLIB?

[junwon,Seo]

Hi, all!!!

In Telnet commands, I entered follow

a123 UID FETCH 106:108 (FLAGS)
* 1 FETCH (UID 106 FLAGS (\Seen))
* 2 FETCH (UID 107 FLAGS (\Seen))
* 3 FETCH (UID 108 FLAGS (\Seen))
a123 OK FETCH completed.

I success..

And, I programmed in Python follow
UID('FETCH','106:108 (FLAGS)')
But, It occured ERROR.

How can I use UID command?