The | operator is used to merge two dictionaries in Python 3.9 and later.
The append() method adds an item to the end of a list.
Values in a dictionary are accessed using square brackets with the key inside.
The pop() method removes and returns the last item from a list.
The get method returns the specified default value if the key is not found in the dictionary.
The in keyword is used to check if a key exists in a dictionary
Lists in Python are ordered, mutable sequences used to store collections of items.
Sets in Python do not allow duplicate elements.
Tuples in Python are created using parentheses.
Tuples are immutable and can have duplicate elements.
Sets do not allow duplicate elements, so adding an existing element does not change the set.