Tutorial Gateway

Python Dictionary len function

by

Python len Dictionary is one of a Dictionary functions, used to return the dictionary length (the total key-value pairs). In this section, we discuss how to use this Python Dictionary len function with practical examples.

The syntax behind this len function is:

len(dictionary_name)

Python Dictionary len Example

The dictionary len function returns the length of a dictionary. The below code prints the myDict length.

TIP: Please refer to the Dictionary to understand Python Dictionaries.

# Python Dictionary len Example

myDict = {1: 'apple', 2: 'Banana' , 3: 'Orange', 4: 'Kiwi'}

print("Dictionary Items: ", myDict)

# Dictionary length
print("\nThe Dictionary length :  ",  len(myDict))

OUTPUT

Python Dictionary len 1

Python Dictionary len Example 2

In this program, we are going to insert new value to a dictionary and check the length. Next, we updated a value and displayed the length.

# Python Dictionary len Example

myDict = {'name': 'Kevin', 'age': 25}

# Print Total Dictionary
print("Dictionary Items  :  ",  myDict)
print("The Dictionary length :  ",  len(myDict))

# Add an Item to Dictionary
myDict['job'] = 'Programmer'
print("\nDictionary Items  :  ",  myDict)
print("The Dictionary length :  ",  len(myDict))

# Update an Item in Dictionary
myDict['name'] = 'Python'
print("\nDictionary Items  :  ",  myDict)
print("The Dictionary length :  ",  len(myDict))

OUTPUT

Python Dictionary len 2