easycollections
What will this output?
a = {1, 2, 3}
b = {3, 4}
print(a ^ b)Python Interview Questions (570 to practise)
Python is the default language for scripting, data work, and back-end services that value readability over raw speed.
Mutable default arguments, the difference between shallow and deep copies, generator laziness, decorator ordering, and how the MRO resolves multiple inheritance.
- Total questions
- 570
- Easy
- 115
- Medium
- 211
- Hard
- 244
Where it shows up: Backend, data engineering, machine learning, automation, and almost every infrastructure team's glue code.
Sample Python questions
Twenty real Python questions from the library, code snippet included. Nothing here is paraphrased for search engines. It is the same text a signed-in user sees.
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())mediumlist ops and slicing
What is the output?
print(any([]), all([]))mediumMRO and C3 linearization
What will this code print?
class A:
def hello(self):
return "A"
class B(A):
def hello(self):
return super().hello() + "B"
print(B().hello())easylist ops and slicing
What will this print?
print(type(range(5)))easyidentity vs equality
What is the output?
print(None == 0, None is 0)easyvariables and None
What is the output?
def f():
print("f called")
return True
print(False and f())mediummutable default trap
What will this output?
class A:
val = []
a1 = A()
a2 = A()
a1.val.append(1)
print(a2.val)mediumidentity vs equality
What will this code output?
a = [1, 2, 3]
b = [1, 2, 3]
print(a == b, a is b)easy== vs equals
What is the result?
if (n := 5) > 3:
print(n)easyitertools
What does this print?
import itertools
c = itertools.cycle("ab")
print([next(c) for _ in range(5)])hardkeyword-only args
What will this code output?
def f(x, y, /, z=10):
return x + y + z
print(f(1, 2))mediumshallow vs deep copy
What is the output?
x = [[0]] * 3
x[0][0] = 99
print(x)mediumint float bool str
What is the output?
print([] or "Hello")
print("" and "World")easylist ops and slicing
What is the output?
x = [1, 2, 3]
print(x[::-1])hardmutable default trap
What happens here?
from dataclasses import dataclass
@dataclass
class A:
items: list = []
a1 = A()
a2 = A()
a1.items.append(1)
print(a2.items)Sign in to answer
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Python topics covered
52 distinct Python topics are tagged across the library. These are the real topic labels stored on the questions, not a hand-written list.
- int float bool str (43)
- list ops and slicing (38)
- string methods strip split join (25)
- data model dunder dispatch (25)
- type hints Optional Union (25)
- identity vs equality (23)
- generators and yield (20)
- metaclasses and __new__ (16)
- __slots__ layout (16)
- collections (15)
- MRO and C3 linearization (14)
- variables and None (14)
- itertools (14)
- keyword-only args (14)
- dataclasses (14)
- asyncio event loop internals (13)
- exception chaining (12)
- multiprocessing vs threading pickling (12)
- property (11)
- refcounting and cyclic GC (11)
- collections Counter defaultdict deque (10)
- classmethod vs staticmethod (10)
- interning (10)
- decorators with arguments (10)
- await scheduling (10)
- custom context managers (10)
- contextmanager (10)
- shallow vs deep copy (9)
- pathlib (9)
- descriptors (9)
- enum (8)
- __init_subclass__ (8)
- CPython bytecode and dis (8)
- the GIL (7)
- free-threaded no-GIL (7)
- mutable default trap (6)
- C-extension boundary buffer protocol (6)
- import system finders loaders (6)
- venv and pip (5)
- f-strings (4)
- functools.lru_cache (4)
- bytecode caching and frames (4)
- functools lru_cache partial (4)
- import system finders and loaders (3)
- C-extension boundary / buffer protocol (3)
- functools (2)
- the import system finders loaders (2)
- == vs equals (1)
- Import system (finders & loaders) (1)
- functools.partial (1)
- C-extension boundary and buffer protocol (1)
- Multiprocessing vs threading / pickling (1)
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