Dictionary and Set Operations in Python

These flashcards cover key operations and functions related to dictionaries and sets in Python programming.

in operator

Used to determine whether a key exists in a dictionary.

del statement

Used to delete an element from a dictionary.

len() function

Returns the number of elements in a dictionary.

empty dictionary

Created using {}.

popitem() method

Returns a randomly selected key-value pair from a dictionary.

pop() method

Returns the value associated with a specified key and removes that key-value pair from the dictionary.

get() method

Returns the value associated with a specified key or a default value if the key is not found.

items() method

Returns all of a dictionary’s keys and their associated values as a sequence of tuples.

len() function

Also returns the number of elements in a set.

add method

Adds one element to a set.

update method

Adds a group of elements to a set.

discard method

Removes an element from a set but does not raise an exception if the element is not found.

remove method

Removes an element from a set and raises an exception if the element is not found.

| operator

Used to find the union of two sets.

− operator

Used to find the difference of two sets.

& operator

Used to find the intersection of two sets.

ˆ operator

Used to find the symmetric difference of two sets.