Python - Dictionary Dictionary Update
Introduction
Dictionaries, like lists, are mutable, so you can change, expand, and shrink them in place without making new dictionaries.
The del statement deletes the entry associated with the key specified as an index.
All collection data types in Python can nest inside each other arbitrarily:
Demo
D = {'eggs': 3, 'test': 2, 'ham': 1}
D['ham'] = ['grill', 'bake', 'fry'] # Change entry (value=list)
print( D )
del D['eggs'] # Delete entry
print( D )
D['brunch'] = 'Bacon' # Add new entry
print( D )
Result
Assigning to an existing index in a dictionary changes its associated value.
Whenever assigning a new dictionary key you create a new entry in the dictionary.