In this tutorial, we will learn about the difference between python lists and tuples.
Python Lists and tuples are used to store series of values and objects in a ordered way. Values can accessed using the index.
What is mutable data type
In python, mutable data types are whose values can be changed after they are declared. List, Dictionary and Set are mutable data type.
What is immutable data type
In Python, immutable data types are whose values cannot be changed once they are declared. Python Tuple, Integer, Float, String are immutable data type.
List syntax
List is declared by using [] square bracket
l = [1, 2, 3, 4, 5]
Tuple syntax
Tuple is declared by using () bracket
t = (1, 2, 3, 4, 5)
Accessing the values inside list and tuple using index
l = [1, 2, 3, 4, 5]
print(l[0])
t = (1, 2, 3, 4, 5)
print(t[0])
Output
1
1
Accessing the values inside list and tuple using slicing
l = [1, 2, 3, 4, 5]
print(l[0:2])
t = (1, 2, 3, 4, 5)
print(t[0:2])
Output
[1, 2]
(1, 2)
Update the values inside list and tuple
l = [1, 2, 3, 4, 5]
l[0] = 100
print(l)
t = (1, 2, 3, 4, 5)
t[0] = 100
print(t)
Output
[100, 2, 3, 4, 5]
Traceback (most recent call last):
File "<string>", line 6, in <module>
TypeError: 'tuple' object does not support item assignment
You can see in the above output, value update to the list is working find but when updating a value in tuple it throws an exception error says that 'tuple' object does not support item assignment.
Python update a list value inside a tuple
t = ([1, 2, 3, 4, 5], 2, 3, 4, 5)
t[0][1] = 200
print(t)
Output
([1, 200, 3, 4, 5], 2, 3, 4, 5)
You can see in the above example output, python will allow to update a list value inside a tuple, because the inner value is under list data type which is mutable.
But it will not allow to update the entire value.
t = ([1, 2, 3, 4, 5], 2, 3, 4, 5)
t[0] = 100
print(t)
Output
Traceback (most recent call last):
File "<string>", line 2, in <module>
TypeError: 'tuple' object does not support item assignment
| Python List | Python Tuple |
|---|---|
| Use square brackets [] | Use parentheses () |
| List is mutable | Tuple is immutable |
| List use more memory | Tuple use less memory compared to list |
| List will take more time while iteration | Tuple will take less time while iteration compared to list |
| Build in method support | No Build in method support |
| Can contain different data type values inside | Can contain different data type values inside |
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