import numpy as np

X_train = np.array([[1, 2], [2, 3], [3, 4], [5, 5]])
y_train = np.array([0, 0, 1, 1])
X_test = np.array([[2, 2], [4, 4]])

predictions = knn_classification(X_train, y_train, X_test, k=3)
print(predictions)  # Ожидаемый результат: [0, 1]

from sklearn.neighbors import KNeighborsClassifier

def knn_classification(X_train, y_train, X_test, k=3):
model = KNeighborsClassifier(n_neighbors=k)
model.fit(X_train, y_train)
return model.predict(X_test)

# Пример использования:
import numpy as np

X_train = np.array([[1, 2], [2, 3], [3, 4], [5, 5]])
y_train = np.array([0, 0, 1, 1])
X_test = np.array([[2, 2], [4, 4]])

predictions = knn_classification(X_train, y_train, X_test, k=3)
print(predictions) # Ожидаемый результат: [0, 1]

search_in_file('example.txt', 'python')

def search_in_file(file_path, query):
query_lower = query.lower()
found = False

with open(file_path, 'r', encoding='utf-8') as f:
for line in f:
if query_lower in line.lower():
print(line.strip())
found = True

if not found:
print("Ничего не найдено.")

# Пример использования
# search_in_file('example.txt', 'python')

from datetime import datetime, timedelta

# Текущая дата и время
now = datetime.now()
print("Сейчас:", now)

# Добавляем 7 дней к текущей дате
future_date = now + timedelta(days=7)
print("Через неделю:", future_date.strftime("%Y-%m-%d"))

🗣️ В этом примере datetime.now() получает текущую дату и время, а timedelta позволяет прибавить 7 дней. Метод strftime() форматирует дату в читаемый строковый формат.

id,name,age
1,Alice,30
2,Bob,25
3,Charlie,35

python csv_to_json.py data.csv

[
  {"id": "1", "name": "Alice", "age": "30"},
  {"id": "2", "name": "Bob", "age": "25"},
  {"id": "3", "name": "Charlie", "age": "35"}
]

import csv
import json
import sys
import os

def csv_to_json(csv_file_path):
try:
json_file_path = os.path.splitext(csv_file_path)[0] + ".json"

with open(csv_file_path, 'r', encoding='utf-8') as csv_file:
reader = csv.DictReader(csv_file)
data = [row for row in reader]

with open(json_file_path, 'w', encoding='utf-8') as json_file:
json.dump(data, json_file, indent=4, ensure_ascii=False)

print(f"Файл успешно конвертирован: {json_file_path}")
except FileNotFoundError:
print(f"Ошибка: Файл {csv_file_path} не найден.")
except Exception as e:
print(f"Ошибка: {e}")

# Пример использования:
if __name__ == "__main__":
if len(sys.argv) < 2:
print("Использование: python csv_to_json.py <путь_к_csv>")
else:
csv_to_json(sys.argv[1])