Python Dictionary

A dictionary stores data as key-value pairs. Dictionaries are useful when you need to access values using meaningful keys instead of numeric indexes.

Create a Dictionary

              
            
Python
Create a simple dictionary.
user = {
    "name": "Alice",
    "age": 25,
    "city": "Bengaluru"
}

print(user)

Access Dictionary Values

              
            
Python
Access values using keys.
user = {"name": "Alice", "age": 25}

print(user["name"])
print(user.get("age"))

Add and Update Values

              
            
Python
Add a new key and update an existing value.
user = {"name": "Alice", "age": 25}

user["age"] = 26
user["email"] = "alice@example.com"

print(user)

Remove Values

              
            
Python
Remove dictionary entries.
user = {"name": "Alice", "age": 25, "city": "Bengaluru"}

del user["city"]
user.pop("age")

print(user)

Loop Through a Dictionary

              
            
Python
Loop through keys and values.
user = {"name": "Alice", "age": 25}

for key, value in user.items():
    print(key, value)

Common Dictionary Methods

Useful methods include keys(), values(), items(), get(), update(), pop(), and clear().

              
            
Python
Using common dictionary methods.
user = {"name": "Alice", "age": 25}

print(user.keys())
print(user.values())
print(user.items())

Summary

Python dictionaries provide fast and convenient key-value storage. You can create, access, update, remove, and iterate over dictionary data using simple syntax.