{AND, OR, NOT} How to Apply Logical Operators to All List Elements in Python?

{AND, OR, NOT} How to Apply Logical Operators to All List Elements in Python?

Problem: Given a list of Boolean elements. What’s the best way to join all elements using the logical “OR” and logical “AND” operations?

Example: Convert the list [True, True, False] using

• The logical “AND” operation to True and True and False = False,
• The logical “OR” operation to True or True or False = True, and
• The logical “NOT” operation to [not True, not True, not False] = [False, False, True].

Solution:

• To perform logical “AND”, use the built-in Python function all(),
• To perform logical “OR”, use the built-in Python function any(), and
• To perform logical “NOT”, use a list comprehension statement [not x for x in list].

Here’s the solution for our three examples:

lst = [True, True, False]

# Logical "AND"
print(all(lst))
# False

# Logical "OR"
print(any(lst))
# True

# Logical "NOT"
print([not x for x in lst])
# [False, False, True]

This way, you can combine an arbitrary iterable of Booleans into a single Boolean value.

Puzzle: Guess the output of this interactive code snippet—and run it to check if you were correct!

The challenge in the puzzle is to know that Python comes with implicit Boolean type conversion: every object has an associated Boolean value. Per convention, all objects are True except “empty” or “zero” objects such as [], '', 0, and 0.0. Thus, the result of the function call all([True, True, 0]) is False.

Where to Go From Here?

Enough theory. Let’s get some practice!

Coders get paid six figures and more because they can solve problems more effectively using machine intelligence and automation.

To become more successful in coding, solve more real problems for real people. That’s how you polish the skills you really need in practice. After all, what’s the use of learning theory that nobody ever needs?

You build high-value coding skills by working on practical coding projects!

Do you want to stop learning with toy projects and focus on practical code projects that earn you money and solve real problems for people?

🚀 If your answer is YES!, consider becoming a Python freelance developer! It’s the best way of approaching the task of improving your Python skills—even if you are a complete beginner.

If you just want to learn about the freelancing opportunity, feel free to watch my free webinar “How to Build Your High-Income Skill Python” and learn how I grew my coding business online and how you can, too—from the comfort of your own home.

Join the free webinar now!