Python List
- How to create a list?
- How to access elements from a list?
- List Index
- Negative Indexing
- How to slice lists in Python?
- How to change or add elements to a list?
- How to delete or remove elements from a list?
- Python List Methods
- List Comprehension
- Other List Operations in Python
- List Membership Test
- Iterating Through a List
- Built-in Functions with List
Python offers a range of compound data types often referred to as sequences. List is one of the most frequently used and very versatile data type used in Python.
How to create a list?
In Python programming, a list is created by placing all the items (elements) inside a square bracket [ ], separated by commas.
It can have any number of items and they may be of different types (integer, float, string etc.).
# To create an empty list
n = []
n=[] print(type(n)) print(n)
Output
<class ‘list’>
[]
# To create a list of integers
n = [1, 2, 3]
# To create a list of float values
n = [1.45, 2.23, 3.98]
n = [1, 2, 3] print(type(n)) print(n) n = [1.45, 2.23, 3.98] print(type(n)) print(n)
Output:
<class ‘list’>
[1, 2, 3]
<class ‘list’>
[1.45, 2.23, 3.98]
# list with mixed datatypes
n = [1, “Hello”, 3.4]
Also, a list can even have another list as an item. This is called nested list.
# nested list
n = [“hello”, [8, 4, 6], [‘a’]]
n = [1, "Hello", 3.4] print(type(n)) print(n) n = ["hello", [8, 4, 6], ['a']] print(type(n)) print(n)
Output:
<class ‘list’>
[1, ‘Hello’, 3.4]
<class ‘list’>
[‘hello’, [8, 4, 6], [‘a’]]
