Discover challenging Python brain teasers that test your skills and stretch your thinking. Gain insights into advanced concepts and enhance your understanding of this versatile language.

Forget Scrabble, Boggle, or Wordle. Tease your mind and test your skills with these fun brain teasers designed to stretch your thinking and expand your understanding of one of the most widely used languages out there. 

Python is simple. These puzzles are not. Good luck!

Python Brain Teasers

# Try it yourself
Try executing the code below to verify the result:

next_uid = 1

class User:
  def __init__(self, name):
    global next_uid
    self.name = name
    self.__id = next_uid
    next_uid += 1
    
u = User('daffy') 
print(f'name={u.name}, id={u.__id}')

# Explanation

Unlike other languages, Python does not have private and protected attributes. By convention, if we prefix our attributes or variables with an underscore, like this  `_`, the attributes  are considered an implementation detail. 


Solution#
Say we choose to use `_id` in `User`. Now all the subclasses of `User` can’t have their own `_id` attribute because they might run over the `_id` that the methods in `User`. The solution Python provides is called name mangling.

Name mangling works by appending `_User` with `__id`, which allows us to run the program successfully. For example, we can change the line `print(f'name={u.name}, id={u.__id}')` using `print(f'name={u.name}, id={u._User__id}')`.



Let’s learn about how attributes work in Python.

Before We Begin

Python Puzzles

Wrapping Up

Puzzle 7: Explanation

Try it yourself

Explanation