Python’s lists are powerful. Especially, if you come from the VBA world its like switching to a new car after years of using the old red Ikarus. Thus, I have decided to write a small article about them, just to be handy for me or for someone else, looking for a good place with references.
What can you do with the Python lists?
The Python language enables you to do the following operations without including additional libraries:
- Extend
- Append
- Insert
- Remove
- Clear
- Index
- Count
- Sort
- Reverse
How are the done? Pretty much, see the code and the output and you would get it. There is one thing to note – the function List.pop([i]) does two things – if it is assigned to a variable, it returns the popped variable and it removes it from the list. Sounds great, eh?
Check out the code:
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#extend OR append print("extend OR append:") listA = [1,2,3,4,5] listA.append([6,7]) listA.extend([8]) print(listA) print("-"*20 + "\n") #insert print("insert:") listA.insert(3,"VitoshAcademy.com") listA.insert(len(listA),"VitoshAcademy.com") print(listA) print("-"*20+ "\n") #remove print("remove:") listA.remove("VitoshAcademy.com") print(listA) iVariable = listA.pop() iVariable2 = listA.pop(0) print(iVariable) print(iVariable2) print(listA) print("-"*20+ "\n") #clear print("clear:") listB = list(listA) print(listB) listB.clear() print(listB) print("-"*20+ "\n") #index and count print("index:") iVariable = listA.index(3) print(iVariable) iVariable = listA.count(3) print(iVariable) print("-"*20+ "\n") #sort and reverse print("sort and reverse:") listA.extend([10,100,1,15]) print(listA) listA.pop(4) listA.sort() print(listA) listA.reverse() print(listA) print("-"*20+ "\n") |
This is the output of the code:
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[evaluate ListPython.py] extend OR append: [1, 2, 3, 4, 5, [6, 7], 8] -------------------- insert: [1, 2, 3, 'VitoshAcademy.com', 4, 5, [6, 7], 8, 'VitoshAcademy.com'] -------------------- remove: [1, 2, 3, 4, 5, [6, 7], 8, 'VitoshAcademy.com'] VitoshAcademy.com 1 [2, 3, 4, 5, [6, 7], 8] -------------------- clear: [2, 3, 4, 5, [6, 7], 8] [] -------------------- index: 1 1 -------------------- sort and reverse: [2, 3, 4, 5, [6, 7], 8, 10, 100, 1, 15] [1, 2, 3, 4, 5, 8, 10, 15, 100] [100, 15, 10, 8, 5, 4, 3, 2, 1] -------------------- |
Enjoy it! 😀