A Python KeyError occurs when you attempt to access an item in a dictionary that does not exist using the indexing syntax. This error is raised because Python cannot return a value for an item that does not exist in a dictionary. The keys are “name”, “price”, and “RAM”. Keys appear before a colon in a dictionary.

Why we get KeyError in Python?

A Python KeyError exception is what is raised when you try to access a key that isn't in a dictionary ( dict ). Python's official documentation says that the KeyError is raised when a mapping key is accessed and isn't found in the mapping. A mapping is a data structure that maps one set of values to another.

How do you avoid KeyError?

Avoiding KeyError when accessing Dictionary Key

We can avoid KeyError by using get() function to access the key value. If the key is missing, None is returned. We can also specify a default value to return when the key is missing.