Table of Contents
Python Mutable
- Python Mutable data types are those whose values can be changed in place.
- Lists
- Sets
- Dictionaries
List
- A list is a collection that is ordered, changeable, and Allows duplicate members.
- The lists are written with square brackets [ ].
Example
Create a list
y=[1,2,3,4,5,6,7] #This is a list
print(y)
Output
[1,
2,
3,
4,
5,
6,
7]
How to Access List Items
- To access list items by using index numbers, inside square brackets.
Example
Create a Tuple
t=["amit", "sumit", "ravi"]
print(t[2])Output
ravi
To access List of a member by using for loop.
Example
Create a list and access using for loop
t=["amit", "sumit", "ravi"]
for i in t:
print(i)
Output
amit
sumit
ravi
sumit
ravi
Check if control statement in List
- Using in keywords to determine if a specified item is present in a List.
Example
Create a List and use if control statements
t=["amit", "sumit", "ravi"]
if "sumit" in t:
print("Yes, 'sumit' is found in list")
else:
print("No, 'sumit' is found in list")
Output
Yes, ‘sumit’ is found in list
How to Change Item Value in List
- To change list items by using index numbers, inside square brackets.
Example
Change item in List
t=["amit", "sumit", "ravi"]
print(t)
t[1]="ram"
print(t)
Output
[‘amit’, ‘sumit’, ‘ravi’]
[‘amit’, ‘ram’, ‘ravi’]
[‘amit’, ‘ram’, ‘ravi’]