Selecting the right built in Collection to store your data can make the difference between a simple program and complex one. For example, if you only want to know the unique values, then choose something that does not allow duplicates and let it do the work for you.
See also Python split string to list.
| Collection | Ordered | Changeable | Allow Duplicates |
| List | Yes | Yes | Yes |
| Tuple | Yes | No | Yes |
| Set | No | No | No |
| Dictionary | Yes | Yes | No |
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