10 Level of writing Python List

 Level 1: Basic List Creation

# Creating a simple list

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

print(my_list)

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[1, 2, 3, 4, 5]

Level 2: Accessing List Elements

# Accessing elements by index

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

first_element = my_list[0]

last_element = my_list[-1]

print( "First:", first_element, "Last:", last_element)

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First: 1 Last: 5

Level 3: List Slicing

# Slicing a list

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

sub_list = my_list[1:4]

print(sub_list)

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[2, 3, 4]

Level 4: Adding Elements to a List

# Appending and extending a list

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

my_list.append(6)

my_list.extend([7, 8])

print(my_list)

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

Level 5: Removing Elements from a List

# Removing elements

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

my_list.remove(2)  

popped_element = my_list.pop()  

print(my_list)

print(popped_element)

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[1, 3, 4]

5

Level 6: List Comprehensions

# Using list comprehensions

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

squared_list = [x**2 for x in my_list]

print(squared_list)

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[1, 4, 9, 16, 25]

Level 7: Nested Lists

# Creating and accessing nested lists

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

element = nested_list[1][2]  

print(nested_list, element)

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

Level 8: Using List Functions and Methods

# Using built-in functions and methods

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

length = len(my_list)

sorted_list = sorted(my_list)

my_list.sort(reverse=True)

print(length, sorted_list, my_list)

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

Level 9: List Iteration

# Iterating over a list

for element in my_list:

    print(element)

5

4

3

2

1

Level 10: Advanced List Operations

# Using advanced operations like map, filter, and reduce

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

from functools import reduce

# Map: applying a function to each element

doubled_list = list(map(lambda x: x * 2, my_list))

print(doubled_list)

# Filter: filtering elements based on a condition

even_list = list(filter(lambda x: x % 2 == 0, my_list))

print(even_list)

# Reduce: reducing the list to a single value

sum_of_elements = reduce(lambda x, y: x + y, my_list)

print(sum_of_elements)

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[2, 4, 6, 8, 10]

[2, 4]

15