Python program to create a dictionary using dict() function

1) Creating an empty dictionary using dict() function

To create an empty dictionary, dict() function without augments can be used.

Syntax:

dictionary_name = dict()

Program:

# Python program to create an empty dictionary

# creating an empty dictionary
dict_a = dict()

# printing the dictionary
print("dict_a :", dict_a)

# printing the length
print("Total elements: ", len(dict_a))

Output:

dict_a : {}
Total elements:  0

2) Creating a dictionary with key-value pairs using dict() function

The dict() function is used to create a dictionary by passing the key-value pairs.

Syntax:

dictionary_name = dict(key=value, key=value,...)

Program:

# Python program to create a dictionary with 
# key-value pairs using dict() function

# creating a dictionary
dict_a = dict(id = 101, name = 'Amit Kumar', Age = 21)

# printing the dictionary
print("dict_a :", dict_a)

# printing the length
print("Total elements: ", len(dict_a))

# printing the key-value pairs
for x, y in dict_a.items():
    print(x, ":", y)

Output:

dict_a : {'Age': 21, 'id': 101, 'name': 'Amit Kumar'}
Total elements:  3
Age : 21
id : 101
name : Amit Kumar