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a guest May 21st, 2019 65 Never
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  1. ```
  2. import copy               # this is the module to use
  3. l1 = [[10,20,30], 1, 2, 3]
  4. l2 = copy.deepcopy(l1)             # create a copy using the deepcopy function from copy
  5.  
  6. l1.append(4)              # append to list l1
  7. l1[0].append(40)          # modify the inner list of l1
  8.  
  9. print( l1 )
  10. print( l2 )
  11. ```
  12.  
  13. **Output**  
  14. *[[10, 20, 30, 40], 1, 2, 3, 4]*  
  15. *[[10, 20, 30], 1, 2, 3]*
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