What are some exercises to practice list comprehensions in Python?

What are some exercises to practice list comprehensions in Python?

Here are a few exercises you can try:

1. Create a list of squares for numbers 1 to 10.
2. Generate a list of even numbers from 1 to 20.
3. Create a list of the first 10 Fibonacci numbers.
4. Convert a list of strings to their lengths.
5. Filter out vowels from a list of characters.

Can you give me the solution for the first exercise?

Sure! To create a list of squares for numbers 1 to 10, you can use the following list comprehension:

squares = [x**2 for x in range(1, 11)]

This will give you the list: [1, 4, 9, 16, 25, 36, 49, 64, 81, 100].

What about the second exercise?

For generating a list of even numbers from 1 to 20, you can use:

even_numbers = [x for x in range(1, 21) if x % 2 == 0]

This will result in the list: [2, 4, 6, 8, 10, 12, 14, 16, 18, 20].

Can you explain how the list comprehension works?

Absolutely! List comprehension consists of an expression followed by a for clause, and optionally, if clauses. It allows you to create a new list by applying an expression to each item in an iterable, filtering items based on a condition.