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.
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
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- Python | Associating a single value with all list items
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- Python | Convert an array to an ordinary list with the same items
- Python | Convert a list to dictionary
- Python | Get dictionary keys as a list
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