Python interview questions

Write an async function double_later(x) that does await asyncio.sleep(0) (a no-op await, just to make it a real coroutine that yields control) and then returns x * 2. Then write entryPoint(numbers) that runs double_later concurrently for every

What does defining a function with async def actually create? If you write result = my_coro_func() but never await it, what happens (or does not happen), and what does await do at the point it appears in the code?

Write a class Point with __init__(self, x, y), a dunder method __eq__ that treats two points as equal when their x and y match, and a dunder method __add__ that returns a new Point whose coordinates are the sums. Then write entryPoint(a, b), where a and

Write a dataclass Cart with one field, items, defaulting to an empty list via field(default_factory=list), and a method add(self, name, price) that appends (name, price) to items. Then write entryPoint(order_batches), where order_batches is a list of

Write a class Version whose __init__ parses a string like "1.4.2" into integer major, minor and patch attributes, and that implements __eq__ and __lt__ by comparing the (major, minor, patch) tuples, plus a __str__ that rebuilds the original

Explain the difference between a class attribute and an instance attribute in Python. What goes wrong if a class attribute is a mutable object such as a list, and how do you avoid the problem?