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Understanding Python Dictionaries

Python dictionaries are unordered collections of items. Each item is a key-value pair. Dictionaries are mutable, which means they can be changed after creation. They are defined using curly braces {} with key-value pairs separated by colons.

Creating Dictionaries

Example 1: Creating a Dictionary

# Creating a dictionary
person = {
    "name": "Karthick AG",
    "age": 30,
    "city": "Chennai"
}
print("Person Dictionary:", person)

Output

Person Dictionary: {'name': 'Karthick AG', 'age': 30, 'city': 'Chennai'}

Example 2: Using the dict() Constructor

# Creating a dictionary using dict()
person = dict(name="Durai", age=28, city="Coimbatore")
print("Person Dictionary:", person)

Person Dictionary: {'name': 'Durai', 'age': 28, 'city': 'Coimbatore'}

Example 3: Creating an Empty Dictionary

# Creating an empty dictionary
empty_dict = {}
print("Empty Dictionary:", empty_dict)

Empty Dictionary: {}

Explanation: Dictionaries are created using curly braces with key-value pairs. Keys must be unique and immutable types such as strings, numbers, or tuples. Values can be of any data type.

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