Python | Front and rear range deletion in a list
Sometimes, we require to shrink a list by deletion of its certain elements. One of the methods that is employed to perform this particular task is front and rear element deletion. It is a good utility whose solution can be useful to have. Let’s discuss certain ways in which this can be performed.
Method #1 : Using list slicing + del operator
The del operator can be clubbed with the slicing action to delete the front and rear elements from a list to obtain a cropped version of list.
# Python3 code to demonstrate # front and rear deletion # using del operator + list slicing # initializing list test_list = [2, 3, 5, 7, 9, 10, 8, 6] # printing original list print ("The original list is : " + str(test_list)) # using del operator + list slicing # front and rear deletion del test_list[-2:], test_list[:2] # printing result print ("The cropped list is : " + str(test_list)) |
chevron_right
filter_none
Output :
The original list is : [2, 3, 5, 7, 9, 10, 8, 6] The cropped list is : [5, 7, 9, 10]
Method #2 : Using list slicing
Above method can be modified and the use of del operator can be omitted to achieve this particular task. We can slice a list in a way that specific number of elements are removed from the list.
# Python3 code to demonstrate # front and rear deletion # using list slicing # initializing list test_list = [2, 3, 5, 7, 9, 10, 8, 6] # printing original list print ("The original list is : " + str(test_list)) # using list slicing # front and rear deletion res = test_list[2 : -2] # printing result print ("The cropped list is : " + str(res)) |
chevron_right
filter_none
Output :
The original list is : [2, 3, 5, 7, 9, 10, 8, 6] The cropped list is : [5, 7, 9, 10]
Recommended Posts:
- Python | Append at front and remove from rear
- Python | Column deletion from list of lists
- range() to a list in Python
- Python | Numbers in a list within a given range
- Python | Create list of numbers with given range
- Python | Assign range of elements to List
- Python | Alternate range slicing in list
- Python List Comprehension | Three way partitioning of an array around a given range
- Python | Print list elements in circular range
- Python | Generate random numbers within a given range and store in a list
- Python | Find missing numbers in a sorted list range
- Python code to move spaces to front of string in single traversal
- Python counter and dictionary intersection example (Make a string using deletion and rearrangement)
- String slicing in Python to check if a string can become empty by recursive deletion
- Python | Convert list of tuples to list of list
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.
