How To Create Dictionary In Python With Dictionary Example

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How to Create Dictionary in Python with Example

In this program, we will learn to create a dictionary, delete the dictionary, insert a value into the dictionary, and display value from a dictionary.

In Python a dictionary can be created by placing a sequence of elements within curly {} braces, separated by a ‘comma’, The dictionary consists of a pair of values, a key, and a corresponding pair element with its key: value

python dictionary operation is like insert, delete, display, etc

learn more about Python Dictionary:

Python Dictionary Items method Definition and usage

Algorithm to create dictionary in Python

Step1 Start
Step2 Create dictionary and assign to stud

Step3 insert 1,2,3, as name,age,sub
Step4 Display stud dictionary
Step5 Insert

Step6 Insert 4 as add and again display dictionary
Step7 Delete 1,3 from dictionary and display

Source Code:

#Create dictionary
stud = {}
print(stud)

# insert operation in dictionary
stud['1']='name' 
stud['2']='age'
stud['3']='sub'

# Display operation in dictionary
print(stud) 
stud['4']='add'
print(stud)

# Delete operation in a dictionary using del
del stud['1'] 
print(stud)
del stud['3']
print(stud)

Output:

{}
{'1': 'name', '2': 'age', '3': 'sub'}
{'1': 'name', '2': 'age', '3': 'sub', '4': 'add'}
{'2': 'age', '3': 'sub', '4': 'add'}
{'2': 'age', '4': 'add'}

FAQ:

How do you create an empty dictionary?

# There are different ways to create empty dictionary in python
# First way
dict1 = {}
print(type(dict1)) # <class ‘dict’>
# Second way
# We can create dictionary by type conversing fron tuple to dictionary
dict2 = dict()
print(type(dict2)) # <class ‘dict’>
# We can not convert list into dictionary
# dict3 = dict[] # SyntaxError: invalid syntax
# print(type(dict3))

How do I create a static dictionary in Python?

In the python dictionary program, a pair of key and value are closed by Curly brackets {}. key:value represents a single element of dictionary in python. Example:
stud = {‘1’: ‘name’, ‘2’: ‘age’, ‘3’: ‘sub’, ‘4’: ‘add’}
print(stud)

How do you declare a dictionary in Python 3?

To declare a dictionary in python 3, just we have to use the curly brackets {}. Example:
variable = {} or we can declare by converting tuple in dictionary
variable = dict()

How do you make a list into a dictionary?

To make a list into a dictionary, we have to need two lists and we have to zip function to combine both list,s and then we have to do type conversion.
Example:
list1 = [1,2,3,4,5]
list2 = [‘Pramod’, ‘Amresh’, ‘Labh’, ‘MuniRaja’, ‘Shiv’]
list3 = zip(list1, list2)
print(type(list3)) # <class ‘zip’>
print(dict(list3)) #{1: ‘Pramod’, 2: ‘Amresh’, 3: ‘Labh’, 4: ‘MuniRaja’, 5: ‘Shiv’}

How do you create a dictionary of a list?

To create a dictionary of a list, use dict.update() to add elements with key and value in dictionary.
dictionary = {“a”: [1, 2]}
dictionary.update({“b”: [3, 4]}) #Merge two dictionaries
print(dictionary)
Output: {‘a’: [1, 2], ‘b’: [3, 4]}

How to Create Dictionary in Python with Dictionary Example