Python | Count number of items in a dictionary value that is a list
In Python, dictionary is a collection which is unordered, changeable and indexed. Dictionaries are written with curly brackets, and they have keys and values. It is used to hash a particular key.
A dictionary has multiple
key:value pairs. There can be multiple pairs where value corresponding to a key is a list. To check that the value is a list or not we use the
isinstance() method which is inbuilt in Python.
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning - Basic Level Course
isinstance() method takes two parameters:
object - object to be checked classinfo - class, type, or tuple of classes and types
It return a boolean whether the object is an instance of the given class or not.
Let’s discuss different methods to count number of items in a dictionary value that is a list.
Method #1 Using
Method #2: Using list comprehension
Method #3: Using
Method #4: Using