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- ```
- import copy # this is the module to use
- l1 = [[10,20,30], 1, 2, 3]
- l2 = copy.deepcopy(l1) # create a copy using the deepcopy function from copy
- l1.append(4) # append to list l1
- l1[0].append(40) # modify the inner list of l1
- print( l1 )
- print( l2 )
- ```
- **Output**
- *[[10, 20, 30, 40], 1, 2, 3, 4]*
- *[[10, 20, 30], 1, 2, 3]*
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