easycollections
What will this output?
a = {1, 2, 3}
b = {3, 4}
print(a ^ b)Python Intermediate
Decorators, generators, OOP quirks. Level up your Python.
- Questions
- 15
- Tier
- Intermediate
- Language
- Python
- Time
- ~18 min
Difficulty mix: 3 easy, 7 medium and 5 hard. The questions are drawn from the Python library at the moment you start, so sitting the test twice does not give you the same paper.
What this test can pull from
52 Python topics are in scope. These are the real topic labels on the questions.
- int float bool str
- list ops and slicing
- string methods strip split join
- data model dunder dispatch
- type hints Optional Union
- identity vs equality
- generators and yield
- metaclasses and __new__
- __slots__ layout
- collections
- MRO and C3 linearization
- variables and None
- itertools
- keyword-only args
- dataclasses
- asyncio event loop internals
- exception chaining
- multiprocessing vs threading pickling
- property
- refcounting and cyclic GC
- collections Counter defaultdict deque
- classmethod vs staticmethod
- decorators with arguments
- interning
- await scheduling
- custom context managers
- contextmanager
- shallow vs deep copy
- pathlib
- descriptors
Questions of the kind this test asks
Six real Python questions from the same pool, snippet included. The answer options and explanations are not shown here. Those come after you attempt them.
easylist ops and slicing
What will be the output?
x = [i**2 for i in range(3)]
print(x)easyenum
What is the output?
from enum import Enum, auto
class Color(Enum):
RED = auto()
BLUE = auto()
print(Color.RED.value, Color.BLUE.value)mediuminterning
What will this code print?
a = 256
b = 256
c = 257
d = 257
print(a is b, c is d)easyint float bool str
What will this print?
print(True + True + False)mediumdecorators with arguments
What will this print?
def deco(f):
def wrapper():
return "Decorated " + f()
return wrapper
@deco
def say():
return "Hello"
print(say())Prefer to pick your own questions? Browse all Python questions. See the other 10 tests.