In Python, a list comprehension is a concise and elegant way to create lists. It allows you to generate a new list by applying an expression to each item in an existing iterable (like a list or range), often in a single line of code, making it more readable and compact than a traditional for loop.

# Traditional way using a for loop
squares_loop = []
for i in range(10):
    squares_loop.append(i  i)

print(f"Using a loop: {squares_loop}")

The Pythonic way using a list comprehension

squares_comp = [i  i for i in range(10)]

print(f"Using comprehension: {squares_comp}")

You can also add conditions

even_squares = [i * i for i in range(10) if i % 2 == 0]
print(f"Even squares only: {even_squares}")

Both the loop and the basic list comprehension produce the exact same result: a list of the first 10 square numbers. However, the list comprehension is more efficient and easier to read once you are familiar with the syntax.

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By: @DataScienceQ 🩵