Mastering Python List Comprehensions: Conditions and Nested Loops

Mastering Python List Comprehensions: Conditions and Nested Loops 🛠️

List comprehension is one of the best tools to write clean and efficient Python code. Today, let's dive deeper by adding conditions and even nesting loops inside list comprehensions.

List comprehension icon

✅ Basic List Comprehension

Create simple lists in a clean, one-liner style:

# Basic list comprehension
numbers = [x for x in range(5)]
print(numbers)  # [0, 1, 2, 3, 4]

✅ Adding a Condition

Filter elements during list creation by adding an if condition.

# Adding a condition
even_numbers = [x for x in range(10) if x % 2 == 0]
print(even_numbers)  # [0, 2, 4, 6, 8]

✅ Nested Loops

Flatten 2D arrays or handle multiple iterations with a nested loop inside the comprehension.

# Nested loops (flattening a 2D list)
matrix = [[1, 2], [3, 4], [5, 6]]
flat = [num for row in matrix for num in row]
print(flat)  # [1, 2, 3, 4, 5, 6]

Mastering list comprehensions not only shortens your code but also improves readability. Just remember: if it starts to look too complex, consider splitting it for clarity!

Short code, strong code. Refining your skills in the basics builds unstoppable momentum. Stay sharp, stay growing — you're building your future! 🚀

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