Cheat sheet for Python list

List Basics:

Creating a List:

my_list = [1, 2, 3, 'four', 5.0]

Accessing Elements:

first_element = my_list[0]

last_element = my_list[-1]

Slicing:

sliced_list = my_list[1:4]  # Returns elements at index 1, 2, and 3

List Operations:

Appending and Extending:

my_list.append(6)        # Adds 6 to the end

my_list.extend([7, 8])   # Extends with elements 7 and 8

Inserting at a Specific Position:

my_list.insert(2, 'inserted')  # Inserts 'inserted' at index 2

Removing Elements:

my_list.remove('four')  # Removes the first occurrence of 'four'

popped_element = my_list.pop(2)  # Removes and returns element at index 2

Sorting:

my_list.sort()   # Sorts the list in ascending order

my_list.reverse()  # Reverses the order of elements

List Functions:

Length and Count:

length = len(my_list)          # Returns the number of elements

count_of_element = my_list.count(2)  # Returns the count of occurrences of 2

Index and In:

index_of_element = my_list.index('four')  # Returns the index of 'four'

is_present = 5 in my_list       # Returns True if 5 is in the list, False otherwise

List Comprehensions:

Creating a New List:

squared_numbers = [x**2 for x in range(5)]

Conditional List Comprehension:

even_numbers = [x for x in range(10) if x % 2 == 0]

Miscellaneous:

Copying a List:

copied_list = my_list.copy()

Clearing a List:

my_list.clear()  # Removes all elements from the list