Python collection - Dictionaries in python

python Share on :

The Python dictionary is used to store data in a key: value pair form. The dictionary is created using the curly brackets in python.

my_dict = {
    "first_name": "John",
    "last_name": "Deo",
    "occupation": "programmer"
}

print(my_dict["first_name"]) #print first_name value of dictionary

print(my_dict.get("first_name")) #same as above

my_dict["first_name"] = "Josef" #To change first_name value

my_dict.values() #return values of dictionary

my_dict["nick_name"] = "JDo" #To add key value to dictionary

my_dict.pop("last_name") #To remove a key value pair from dictionary based on key

del my_dict["last_name"] #Same as above

my_dict.clear() #empty a dictionary

my_dict.copy() #To copy a dictionary

Best JSON Validator, JSON Tree Viewer, JSON Beautifier at same place. Check how cool is the tool

Dictionaries in python represent a key-value pair datastore in a variable. You can access the value of the dictionary item by its key name. You can also change and remove items from a dictionary using a key name.

If you are using Python version 3.7 and higher, the dictionary will be ordered, and for version 3.6 and lower the dictionary will be unordered.

A dictionary can not contain duplicate items.

Example of loop through dictionary

subject = {
  'name': 'Math',
  'score': 100,
  'code': 'Math001',
  'lessons': 20
}

for key in subject:
    print(key, 'is ', subject[key])

# -> name is  Math
# -> score is  100
# -> code is  Math001
# -> lessons is  20

We can loop through a dictionary as the above code snippet.

Contribute to this Snippet

Was this helpful?

Created by :

@

Write your Comment

1 Comments

Devsheet

You can also create dictionaries in python using dict constructor. Here is the example

my_dict = dict("first_name" = "John", "last_name" = "Deo", "occupation" = "programmer")

Similar code snippets

Create your own code snippets and search them using our portal and chrome extension

Programming Feeds

Learn something new everyday on Devsheet

Important Links

Join Devsheet Create new snippet Ask a Question Write an article Online JSON Viewer