Какие задачи решал

def binary_search(arr, target):
    left, right = 0, len(arr) - 1
    while left <= right:
        mid = (left + right) // 2
        if arr[mid] == target:
            return mid
        elif arr[mid] < target:
            left = mid + 1
        else:
            right = mid - 1
    return -1

import requests

def get_user_data(user_id):
    response = requests.get(f'https://api.example.com/users/{user_id}')
    return response.json() if response.status_code == 200 else None

import asyncio

async def fetch_data(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            return await response.text()

df.groupby('category')['price'].mean()