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',
'email': 'digital.academy@free.fr'
}
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:
○ Data Types in Python - • DATA TYPES in Python (Numbers, Strings, Li...
○ Operators in Python - • OPERATORS in Python (Arithmetic, Assignmen...
○ IF Statements in Python - • CONDITIONAL Statements in Python (IF, ELIF...
○ FOR Loops in Python - • FOR Loop in Python (Syntax, Break, Continu...
📖 Blog: http://digital.academy.free.fr/blog
📖 [FULL Course] HOW TO Learn Python? Python Tutorial for Beginners: • 🐍 Python 101: Learn Python Basics for Abso...
📖 [PLAYLIST] Complete Python Development Course for Beginners: http://digital.academy.free.fr/playli...
🧑🎓 [COURSE] http://digital.academy.free.fr/courses
📘 [BOOK] Python for Absolute Beginners: https://amzn.to/3NvyOWV
🛒 Shopping and Discounts: http://digital.academy.free.fr/store
💌 Weekly Newsletter for Developers: https://www.getrevue.co/profile/digit...
#Python #Tutorial #Beginners #Shorts
***
♡ Thanks for watching and supporting ♡
Please Subscribe. Hit the notification bell.
Like, Comment and Share.
***
♡ FOLLOW US ♡
✧ http://digital.academy.free.fr/
✧ / digitalacademyy
✧ / digitalacademyfr
✧ / digital_academy_fr
✧ / digitalacademyonline
♡ SUPPORT US ♡
✧ http://digital.academy.free.fr/join
✧ http://digital.academy.free.fr/store
✧ http://digital.academy.free.fr/donate
✧ http://digital.academy.free.fr/subscribe
✧ / digital_academy
✧ https://www.buymeacoffee.com/digital_...
***
Auf dieser Seite können Sie das Online-Video How to Create a Dictionary in Python? - Python Tutorial for Beginners mit der Dauer stunde minuten sekunde in guter Qualität ansehen, das der Benutzer Digital Academy 20 März 2021 hochgeladen hat, den Link mit Freunden und Bekannten teilen, dieses Video wurde auf Youtube bereits 590 Mal angesehen und es wurde von 14 den Zuschauern gefallen. Viel Spaß beim Betrachtenden Zuschauern gefallen!
