l a n g c h a i n = = 0 . 1 . 1 3 
 
 s t r e a m l i t = = 1 . 2 9 . 0 
 
 o p e n a i = = 1 . 1 4 . 2 
 
 p y t h o n - d o t e n v = = 1 . 0 . 0 
 
 l a n g c h a i n - o p e n a i = = 0 . 1 . 0 