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Python Program to Slice Lists

In this example, you will understand different ways of list slicing in Python.

To understand this example, you should have the knowledge of the following Python programming topics:


The format for list slicing is [start:stop:step].

  • start is the index of the list where slicing starts.
  • stop is the index of the list where slicing ends.
  • step allows you to select nth item within the range start to stop.

List slicing works similar to Python slice() function.


Get all the Items

my_list = [1, 2, 3, 4, 5]

print(my_list[:])

Output

[1, 2, 3, 4, 5]

Get all the Items After a Specific Position

my_list = [1, 2, 3, 4, 5]

print(my_list[2:])

Output

[3, 4, 5]

Please note that indexing starts from 0. Item on index 2 is also included.


Get all the Items Before a Specific Position

my_list = [1, 2, 3, 4, 5]

print(my_list[:2])

Output

[1, 2]

The items before index 2 are sliced. Item on index 2 is excluded.


Get all the Items from One Position to Another Position

my_list = [1, 2, 3, 4, 5]

print(my_list[2:4])

Output

[3, 4]

The starting position (i.e. 2) is included and the ending position (i.e. 4) is excluded.


Get the Items at Specified Intervals

my_list = [1, 2, 3, 4, 5]

print(my_list[::2])

Output

[1, 3, 5]

The items at interval 2 starting from index 0 are sliced.

If you want the indexing to start from the last item, you can use negative sign -.

my_list = [1, 2, 3, 4, 5]

print(my_list[::-2])

Output

[5, 3, 1]

The items at interval 2 starting from the last index are sliced.

If you want the items from one position to another, you can mention them from start to stop.

my_list = [1, 2, 3, 4, 5]

print(my_list[1:4:2])

Output

[2, 4]

The items from index 1 to 4 are sliced with intervals of 2.

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