Dictionary in Python

 

Dictionary in Python

A dictionary in Python is a built-in, mutable, collection data structure that stores data in key-value pairs.

A dictionary is a collection which is ordered*, changeable and do not allow duplicates. Dictionaries are written with curly brackets, and have keys and values:

Ex.1

dict ={

  "Name": "AD Computer Campus",

  "Blog": "Python",

  "year": 2019,

}

print(dict)

Output

{'Name': 'AD Computer Campus', 'Blog': 'Python', 'year': 2019}

Ex.2

dict ={

  "Name": "AD Computer Campus",

  "Blog": "Python",

  "year": 2019,

}

print(dict[Name])

Output

AD Computer Campus

Duplicates Not Allowed

dict ={

  "Name": "AD Computer Campus",

  "Blog": "Python",

  "year": 2019,

  "year": 2022,

}

print(dict)

Output

{'Name': 'AD Computer Campus', 'Blog': 'Python', 'year': 2022}

Dictionary Length

dict ={

  "Name": "AD Computer Campus",

  "Blog": "Python",

  "year": 2019,

}

print(len(dict))

Output

3

Dictionary String, int, Boolean, and list data types:

Prog 1.

dict ={

  "Name": "AD Computer Campus",

  "Blog": "Python",

  "year": 2019,

  "colors": ["red", "white", "blue"]

}

print(dict)

Output

{'Name': 'AD Computer Campus', 'Blog': 'Python', 'year': 2019, 'colors': ['red', 'white', 'blue']}

Prog 2.

info=    {

"Name" : "Rahul",

"Subject" : ["python","C","Java"],

"Topic" : ("dict","set"),

"age" : 35,

"is _adult" : True,

"marks" : 94.6

}

print(info)

Output

{'Name': 'Rahul', 'Subject': ['python', 'C', 'Java'], 'Topic': ('dict', 'set'), 'age': 35, 'is _adult': True, 'marks': 94.6}