python study notes of built-in functions

The reversed # () 
# L = [1,2,3,4,5] 
# l.reverse () 
# Print (L) 
# L = [1,2,3,4,5] 
# the reversed L2 = (L) 
Print # (L2) 
# retain the original list, returns a reverse iterator 

# = L (1,2,23,213,5612,342,43) 
# = SLI Slice (1,5,2) 
# Print (L [SLI ]) 
# Print (L [. 1:. 5: 2]) 

# Print (the format ( 'Test', '<20 is')) 
# Print (the format (' Test ','> 40 ')) 
# Print (the format (' test ',' ^ 40 ') )