Lists
- Data items: do not need to have the same type
- Creation: Enclose different data items separated by commas in square brackets
list1 = ['Google', 'Runoob', 1997, 2000]- Indexing: starts from 0, the second index is 1, and so on.
- Reverse indexing: starts from the end, the index of the last element is -1, the one before it is -2, and so on.
- Updating lists:
#!/usr/bin/python3
list = ['Google', 'Runoob', 1997, 2000]
print ("The third element is: ", list[2])
list[2] = 2001
print ("The updated third element is: ", list[2])
list1 = ['Google', 'Runoob', 'Taobao']
list1.append('Baidu')
print ("The updated list is: ", list1)The output of the above example:
The third element is: 1997
The updated third element is: 2001
The updated list is: [‘Google’, ‘Runoob’, ‘Taobao’, ‘Baidu’]
If you want to add all elements of another list one by one, use extend:
result = [] # Empty list
result.append(7) # result -> [7]
result.append('cat') # result -> [7, 'cat']
# Note: Only one element can be added at a time
result.append([1, 2]) # result -> [7, 'cat', [1, 2]] as a single element
result.extend([3, 4]) # result -> [7, 'cat', [1, 2], 3, 4]Python 3 Lists | Runoob Tutorial:
https://www.runoob.com/python3/python3-tutorial.html