Python List Methods

List Methods

Modifying List Elements

• append(element): adds a new element to the end of the list
• extend(iterable): adds all elements from an iterable to the end of the list
• insert(index, element): inserts an element at a specific position in the list
• remove(element): removes the first occurrence of an element in the list
• pop([index]): removes and returns an element at a specific position in the list (default is last element)
• sort(): sorts the list in-place
• reverse(): reverses the order of the list in-place

Accessing List Elements

• index(element): returns the index of the first occurrence of an element in the list
• count(element): returns the number of occurrences of an element in the list

Copying and Joining Lists

• copy(): returns a shallow copy of the list
• + operator: concatenates two lists
• * operator: repeats a list a specified number of times

Set Methods

Creating Sets

• set(iterable): creates a set from an iterable
• {element1, element2, ...}: creates a set from individual elements

Set Operations

• union(other_set): returns a new set with all elements from both sets
• intersection(other_set): returns a new set with elements common to both sets
• difference(other_set): returns a new set with elements in the original set but not in the other set
• symmetric_difference(other_set): returns a new set with elements in either set but not in both
• issubset(other_set): checks if all elements of the original set are in the other set
• issuperset(other_set): checks if all elements of the other set are in the original set

Modifying Sets

• add(element): adds an element to the set
• update(iterable): adds all elements from an iterable to the set
• remove(element): removes an element from the set
• discard(element): removes an element from the set if it exists
• pop(): removes and returns an arbitrary element from the set

List Methods

Modifying List Elements

• append(element) adds a new element to the end of the list.
• extend(iterable) adds all elements from an iterable to the end of the list.
• insert(index, element) inserts an element at a specific position in the list.
• remove(element) removes the first occurrence of an element in the list.
• pop([index]) removes and returns an element at a specific position in the list (default is last element).
• sort() sorts the list in-place.
• reverse() reverses the order of the list in-place.

Accessing List Elements

• index(element) returns the index of the first occurrence of an element in the list.
• count(element) returns the number of occurrences of an element in the list.

Copying and Joining Lists

• copy() returns a shallow copy of the list.
• + operator concatenates two lists.
• * operator repeats a list a specified number of times.

Set Methods

Creating Sets

• set(iterable) creates a set from an iterable.
• {element1, element2,...} creates a set from individual elements.

Set Operations

• union(other_set) returns a new set with all elements from both sets.
• intersection(other_set) returns a new set with elements common to both sets.
• difference(other_set) returns a new set with elements in the original set but not in the other set.
• symmetric_difference(other_set) returns a new set with elements in either set but not in both.
• issubset(other_set) checks if all elements of the original set are in the other set.
• issuperset(other_set) checks if all elements of the other set are in the original set.

Modifying Sets

• add(element) adds an element to the set.
• update(iterable) adds all elements from an iterable to the set.
• remove(element) removes an element from the set.
• discard(element) removes an element from the set if it exists.
• pop() removes and returns an arbitrary element from the set.