Python Lists

my_list = [1, 2, 3, 4, 5]

mixed_list = [1, "hello", 3.14, True]

my_list = [1, 2, 3, 4, 5]
my_list[2] = 10   # Changing the third element from 3 to 10

List Methods:

Lists in Python also support various operations and methods, such as appending elements, extending lists, removing elements, sorting, reversing, and more.

1. append(x): Add an item to the end of the list.

2. extend(iterable): Extend the list by appending elements from the iterable.

3. insert(i, x): Insert an item at a given position.

4. remove(x): Remove the first occurrence of a value from the list.

5. pop([i]): Remove the item at the given position in the list, and return it. If no index is specified, removes and returns the last item in the list.

6. clear(): Remove all items from the list.

7. index(x[, start[, end]]): Return zero-based index in the list of the first occurrence of the value.

8. count(x): Return the number of occurrences of value x.

9. sort(key=None, reverse=False): Sort the items of the list in place.

10. reverse(): Reverse the elements of the list in place.

11. copy(): Return a shallow copy of the list.

Here's an example of using some list methods:

# Python list methods
my_list = [1, 2, 3]
my_list.append(4)  # Appending an element to the end
print(my_list)
my_list.extend([5, 6, 7])  # Extending the list with another list
print(my_list)
my_list.remove(3)  # Removing an element
print(my_list)
my_list.sort()  # Sorting the list
print(my_list)

[1, 2, 3, 4]
[1, 2, 3, 4, 5, 6, 7]
[1, 2, 4, 5, 6, 7]   
[1, 2, 4, 5, 6, 7]  

Slicing:

List slicing in Python allows you to access a subset of elements from a list. The syntax for slicing is 'list[start:stop:step]'.

1. start: The starting index of the slice (inclusive).

2. stop: The ending index of the slice (exclusive).

3. step: The step value determining the increment between indices (optional, default is 1).

Here are some examples:

my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

# Basic slicing
print(my_list[2:5])  # Output: [3, 4, 5]
print(my_list[:5])  # Output: [1, 2, 3, 4, 5]
print(my_list[5:])  # Output: [6, 7, 8, 9, 10]

# Negative indices
print(my_list[-3:])  # Output: [8, 9, 10]

# Slicing with step
print(my_list[::2])  # Output: [1, 3, 5, 7, 9]

# Reverse a list using slicing
print(my_list[::-1])  # Output: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

• These are some of the common methods and slicing techniques used with lists in Python.

[3, 4, 5]
[1, 2, 3, 4, 5]
[6, 7, 8, 9, 10]
[8, 9, 10]
[1, 3, 5, 7, 9]
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1] 

Note: Lists are widely used in Python due to their flexibility and simplicity, making them one of the fundamental data structures in the language.