python3 struct module

Use struck modules: struct two modules is the most important function pack () package, unpack () unpacked.

# Coding: UTF. 8- 
Import struct 

A = 18 is 
bytes = struct.pack ( ' I ' , A)
 Print ( " length after Pack S%: " % A, len (bytes)) length after # 18 pack: 4
 Print (bytes) B # '\ X12 \ xOO \ xOO \ xOO' 
S = struct.unpack ( ' I ' , bytes) [0]
 Print (S) # 18 is