Learn Python Coding
Learn Python through simple, practical examples and real coding ideas. Clear explanations, useful snippets, and hands-on learning for anyone starting or improving their programming skills. Admin: @HusseinSheikho || @Hussein_Sheikho
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“Learn Python through simple, practical examples and real coding ideas. Clear explanations, useful snippets, and hands-on learning for anyone starting or improving their programming skills.
Admin: @HusseinSheikho || @Hussein_Sheikho”
Yuqori yangilanish chastotasi (oxirgi ma’lumot 31 Oktabr, 2026 da olingan) sababli kanal doimo dolzarb va katta qamrovli bo‘lib qoladi. Analitika auditoriya kontent bilan faol hamkorlik qilishini, uni Texnologiyalar & Aralashmalar toifasidagi muhim ta’sir nuqtasiga aylantirishini ko‘rsatadi.
import uuid
from dataclasses import dataclass
from typing import Optional
@dataclass
class User:
username: str
class InMemoryUserRepository:
def __init__(self):
self._users = []
def add(self, user: User) -> None:
self._users.append(user)
def search(self, query: Optional[str] = None) -> list[User]:
if query is None:
return self._users
else:
return [
user
for user in self._users
if query in user.username
]
# happy path
def test_search_users_without_query_lists_all_users():
user1 = User(username="john@doe.com")
user2 = User(username="marry@doe.com")
repository = InMemoryUserRepository()
repository.add(user1)
repository.add(user2)
assert repository.search() == [user1, user2]
# happy path
def test_search_users_with_email_part_lists_all_matching_users():
user1 = User(username="john@doe.com")
user2 = User(username="bob@example.com")
user3 = User(username="marry@doe.com")
repository = InMemoryUserRepository()
repository.add(user1)
repository.add(user2)
repository.add(user3)
assert repository.search("doe") == [user1, user3]
# edge test case
def test_search_users_with_empty_query_lists_all_users():
user1 = User(username="john@doe.com")
user2 = User(username="marry@doe.com")
repository = InMemoryUserRepository()
repository.add(user1)
repository.add(user2)
assert repository.search("") == [user1, user2]
# negative test case
def test_search_users_with_random_query_lists_zero_users():
user1 = User(username="john@doe.com")
repository = InMemoryUserRepository()
repository.add(user1)
assert repository.search(str(uuid.uuid4())) == []
# security test
def test_search_users_with_sql_injection_has_no_effect():
user1 = User(username="john@doe.com")
repository = InMemoryUserRepository()
repository.add(user1)
repository.search("DELETE FROM USERS;")
assert repository.search() == [user1]