Python list slicing slices the list from start index till end – 1, specified as list elements. So its tricky when we require to also slice the last element of list. Trying to slice till list size + 1 gives an error. Let’s discuss ways in which last element can be included during a list slice.
Method #1 : Using None
During list slicing, giving the desired first index K and specifying ‘None’ as the second argument in slicing works internally as slicing all the elements from K in list till end including it.
# Python3 code to demonstrate # list slicing from K to end# using None # initializing listtest_list = [5, 6, 2, 3, 9] # printing original listprint ("The original list is : " + str(test_list)) # index to begin slicingK = 2 # using None # to perform list slicing from K to endres = test_list[K : None] # printing result print ("The sliced list is : " + str(res)) |
The original list is : [5, 6, 2, 3, 9] The sliced list is : [2, 3, 9]
Method #2 : Leaving the last element empty
Usually, not specifying any element as end element of slicing instructs python to include whole list after K in list. But the main drawback in using this is code readability. Hence above method is preferred more than this.
# Python3 code to demonstrate # list slicing from K to end# without specifying last element # initializing listtest_list = [5, 6, 2, 3, 9] # printing original listprint ("The original list is : " + str(test_list)) # index to begin slicingK = 2 # without specifying last element # to perform list slicing from K to endres = test_list[K :] # printing result print ("The sliced list is : " + str(res)) |
The original list is : [5, 6, 2, 3, 9] The sliced list is : [2, 3, 9]
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course
