How To Use Python Dictionary Explain Briefly Details With Examples 

How To Use Python Dictionary Explain Briefly Details With Examples 

Python Dictionary: A Dictionary in Python as you guys all know Python programming language is one of the most popular programming languages.

nowadays it provides us with numerous applications and various out-of-the-box features one such concept is the dictionary in Python.

We use a dictionary then we will compare the dictionary with the lists moving further.

we will learn how to implement a dictionary and various operations.

we have for dictionary in Python and finally.

Important Variable Topic in Other Languages 

👉C++ Variables

👉Java Variables

👉C Variables 

Dictionary: Python so what is the dictionary in Python it is a collection datatype just like a set or a list but certain features make a dictionary unique so let's take a look at the features of the Python dictionary, first of all, it is unordered.

We can change values in a dictionary as well since it is mutable. also, it has key-value pairs which are like a map.

we have in other programming languages and it is indexed as well since the keys are distinct and can be used as indexes to access or change any values in the dictionary. 

A dictionary does not have any duplicate members as well now that we know dictionary in Python.

Why do we use a dictionary in Python?

1. First of all the reason would be it is unordered and stores data like a map. 

2. one unique feature that Python dictionary has and it also contains the key-value pairs unlike any other data type or object in Python.

3. it is almost similar to a real-life dictionary.
where we have distinct values and corresponding to these values there are respective definitions in the case of the dictionary even though.

4. There are no duplicate members we can mention duplicate members in the values but the keys have to be unique to access these members since there are no indexes also we use the keys as indexes.

How we implement a dictionary in Python

we will try to implement a dictionary that takes the name of the dictionary as a so inside the curly brackets.

I can give the key-value pairs so I'll give one as my first key.

when I am specifying the key-value pairs I have to use the colon to separate the key from the value now I'll give one value.

when we are declaring a dictionary we have to separate these key-value pairs with a comma.

Syntax of Dictionary 

dict_name={

key1:value1,key2:value2,key3:value3,.....

}

How To Create Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print(student)

*****OUTPUT*****

{'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'}

Access Element of Dictionary: Python dictionary can be accessed elements of dictionary using the key name.

How Use Key Name Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Student Name:",student["name"]) 

print("Student Roll No:",student["rollno"]) 

print("Student Email:",student["email"]) 

print("Student address:",student["address"])

*****OUTPUT*****

Student Name: icoderweb 

Student Roll No: 807714 

Student Email: icoderweb@gmail.com 

Student address: Delhi 

Access get Method in Dictionary: Python dictionary can be used get Method applied key name. it is very useful Method in Python dictionary.

How Use get Method Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Student Name:",student.get("name"))

print("Student Roll No:",student.get("rollno"))

print("Student Email:",student.get("email"))

print("Student address:",student.get("address"))

*****OUTPUT*****

Student Name: icoderweb 

Student Roll No: 807714 

Student Email: icoderweb@gmail.com 

Student address: Delhi 

Access Value Loop: Python gets the value using Loop.it can be used key and value pair in this method.

How Use oop Method Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

for value in student:

        print("Student Name:",vlaue,student[value])

*****OUTPUT*****

Student Name: icoderweb 

Student Roll No: 807714 

Student Email: icoderweb@gmail.com 

Student Address: Delhi 

Update Dictionary Value Python dictionary changeable. Dictionary is mutable it can be easily updated using a key name.

How To Update Method Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Before Update Dictionary:",student)

student["name"]="Python"

print("After Update Dictionary:",student)

*****OUTPUT*****

Before Update Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'} 

After Update Dictionary: {'name': 'Python', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'}

Length of dictionary: Python len function can be used to get the length of any dictionary. Length function gets the information of present value in the dictionary.

How To Find Length of Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Lenght of Dictionary:",len(student))

*****OUTPUT*****

Lenght of Dictionary: 4

Add Elements in DictionaryPython add can be used to add new elements in a dictionary using the new key.

How To Add Elements Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Before Add Element in Dictionary:",student)

student["dob"]='02/03/2000'

print("After Add Element in Dictionary:",student)

*****OUTPUT*****

Before Add Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'} 

After Add Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi', 'dob': '02/03/2000'}

Delete Element from pop() Function dictionary
The python pop() function can be used to remove specified elements from the dictionary.pop Method used any key elements remove from the dictionary.

How To Delete Elements Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Before Delete Element in Dictionary:",student)

student("email")

print("After Delete Element in Dictionary:",student)

*****OUTPUT*****

Before Delete Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'} 

After Add Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'address': 'Delhi'}

Delete Element using del keyboard dictionary
Pythonkeywordsd can be used to remove specified elements from the dictionary. The method used any key elements remove from the dictionary.

How To Delete Elements Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Before Delete Element in Dictionary:",student)

del student["email"]

print("After Delete Element in Dictionary:",student)

*****OUTPUT*****

Before Delete Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'} 

After Add Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'address': 'Delhi'}

Clear Dictionary: Python clear dictionary can be used to empty the dictionary.

How To Clear Dictionary in Python?

student={

 "name":"icoderweb", 

 "rollno":807714, 

 "email":"icoderweb@gmail.com", 

 "address":"Delhi" 

} 

print("Before Clear Element in Dictionary:",student)

student.clear()

print("After Clear Element in Dictionary:",student)

*****OUTPUT*****

Before Clear Element in Dictionary: {'name': 'icoderweb', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'}

 After Clear Element in Dictionary: {}

Nested Dictionary: Python nested dictionary can be used to another dictionary list data in Nested dictionary.

How To use Nested Dictionary in Python?

student={

"Ravi":{

"name":"Ravi", 

"rollno":807714, 

"email":"icoderweb@gmail.com", 

"address":"Delhi" 

}, 

"Baby":{ 

"name":"Baby", 

"city":"Rampur", 

"address":"Kolkata" 

}

} 

print("Ravi Information:",student["Ravi"]) 

print("Baby Information:",student["Baby"]) 

*****OUTPUT*****

Ravi Information: {'name': 'Ravi', 'rollno': 807714, 'email': 'icoderweb@gmail.com', 'address': 'Delhi'} 

Baby Information: {'name': 'Baby', 'city': 'Rampur', 'address': 'Kolkata'}