How to Create a Dictionary in Python? - Python Tutorial for Beginners

🎓 Welcome back to Digital Academy, the Complete Python Development Tutorial for Beginners, which will help you Learn Python from A to Z!

🖥️ How to Create a Dictionary in Python?

Creating a dictionary in Python is as simple as placing "key: value" items inside curly braces {}, and separated by comma. Each key is separated from its associated value by a colon ":".

Let's have a closer look at the syntax of a Dictionary in Python

Here is an example, in which you want to store an employee record. First, Let's declare an empty dictionary - using the curly braces {}. Eventually, you will then add all of the personal information about the employee, so you can store its information and then access it later.

employee = {
'age': 27,
'city': 'Paris',
'job': 'Youtuber',
'name': 'Digital Academy',
}

You can also convert two-value sequences into a dictionary, using the built-in function dict() in Python. The first item inside each sequence is then used as the key, and the second as the value.

# Using dict() constructor
my_dict = dict({'name':'apple', 2:'strawberry'})

# From sequence, having each item as a pair
my_dict = dict([('name','Digital Academy'), ('age',27)]) # List of Tuples
my_dict = dict((['name','Digital Academy'], ['age',27])) # Tuple of Lists

# my_dict = {'name': 'Digital Academy', 'age': 27}

When the keys are simple strings, it is sometimes easier to specify key:value pairs, using keyword arguments.

my_dict = dict(
age = 27,
job = 'Youtuber',
name = 'Digital Academy'
)

# my_dict = {'name': 'Digital Academy', 'age': 27, 'job': 'Youtuber'}

---

Dictionaries are pretty straightforward, but here are a few points you should be aware of:

○ Keys must be unique

A key can appear in a dictionary only once. Even if you specify a key more than once during the creation of a dictionary, the last value for that key becomes the associated value.

my_dict = {
'age': 27,
'name': 'Jérémy',
'name': 'Digital Academy'
}

# my_dict = {'name': 'Digital Academy', 'age': 27}

○ Key must be Immutable type

You can use any object of immutable type as dictionary keys – such as numbers, strings, booleans, tuples. Otherwise an exception is raised, when mutable object is used as a key.

my_dict = {
0: 1, # Number
True: 'a', # Boolean
(2,2): 25, # Tuple
[2,2]: 25, # TypeError: unhashable type: 'list'
'name': 'Digital Academy' # String
}

○ Value can be of any type

There are no restrictions on dictionary values. A dictionary value can be any type of object, and can even appear in a dictionary, multiple times.

# Values of different datatypes
my_dict = {
'a': [1,2,3], # List
'b': {1,2,3} # Set
}

# Duplicate values
my_dict = {
'a': [1,2], # List a
'b': [1,2], # List b
'c': [1,2] # List c
}

Let's play this video, stick around and watch until the end of this video! 👍🏻

- Digital Academy™ 🎓

***

☞ WATCH NEXT:

#Python #Tutorial #Beginners #Shorts

***

♡ Thanks for watching and supporting ♡
Please Subscribe. Hit the notification bell.
Like, Comment and Share.

***

♡ FOLLOW US ♡

♡ SUPPORT US ♡

***

[DigitalAcademyOnline]

How to Create a Dictionary in Python? 🤔

[xJrmy]

Thanks for sharing this new video on Dictionary in Python 🙏🏻