PythonLists and tuples
list.
Inserts an item at a chosen position in a list.
- Returns
None- Changes the original
- Yes
Example
#Python
steps = ["HTML", "JavaScript"]
steps.insert(1, "CSS")
steps.insert(0, "Intro")
steps.insert(100, "Project")
print(steps)Resultsaved result, you can check it
['Intro', 'HTML', 'CSS', 'JavaScript', 'Project']
Definition and usage
#The insert(index, element) method inserts an item before the position at the given index. The remaining items shift to the right.
insert(0, x) adds an item to the start of the list. An index larger than the length of the list appends the item at the end, and a negative index counts from the end.
Inserting at the start of a large list is slow, because every item has to shift. If you often add items at both ends, use collections.deque.
Syntax
#Syntax
list.insert(index, element)Parameters
#index
int
The position before which to insert the item.element
any value
The item to insert.
Good practices
#- For adding to the end, use
append(), it is faster and more readable. - When you often add items at the start, use
collections.dequeand itsappendleft()method.
Related entries
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