Params değerleri sanırım tupple olduğundan. Dışardan eklediğim input değişken değerini kabul etmiyor.
Nasıl Params parametrelerini sozluğe çevirebilirim
Bu şekilde denediğimde requests 404 hatası veriyor

"page_size":Icerik_Sayisi, bu şekilde kabul etmiyor

import requests

Icerik_Sayisi = input("Kaç adet içerik çekilsin:")
    
headers = {
    'authority': 'www.pinterest.co.uk',
    'sec-ch-ua': '" Not;A Brand";v="99", "Google Chrome";v="97", "Chromium";v="97"',
    'x-pinterest-appstate': 'background',
    'x-app-version': 'c7ec415',
    'x-pinterest-pws-handler': 'www/search/[scope].js',
    'sec-ch-ua-mobile': '?0',
    'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36',
    'accept': 'application/json, text/javascript, */*, q=0.01',
    'x-requested-with': 'XMLHttpRequest',
    'x-pinterest-source-url': '/search/pins/?q=Garden%20ideas',
    'sec-ch-ua-platform': '"Windows"',
    'sec-fetch-site': 'same-origin',
    'sec-fetch-mode': 'cors',
    'sec-fetch-dest': 'empty',
    'referer': 'https://www.pinterest.co.uk/',
    'accept-language': 'tr-TR,tr;q=0.9,en-US;q=0.8,en;q=0.7,de;q=0.6',
    'cookie': 'csrftoken=5cfbeffc8a624c8c21aa8672b010b459; g_state={"i_l":0}; _auth=0; fba=True; _pinterest_sess=TWc9PSY4aUJ3SHp4VGUwNHBRRlJYTTFxUmtrWnNOZDg0c0xReEgrTE5GWkZYWTdnQ09DMjUydk9Dc01aUktIdXh6UGV0b0RqYy9seWxHa2c3eG9rVVZ1Q0dTZ3QrZWdpSzZRKzc2WnhacjB0Y2F3a3o4Wk9aTU5kK1UvbkYzQjU3Y2NXa0l1UFhxMW1iUXVLSmVGREIzUUtLa3BRY2dhcnVnOUcvRzhya1hVK3NSMjgvbmxNVWl3Z0ZhWXYwR1UrQWloYUY3YXpaaFBYcHBwek1vU2tFVjJCbG83QzdIbVliYzBOMXRBNFNoUGxsQW15SGk5cnhqWDhlWXpKZnA5a3J2Q1kvOFVyb1c5ZW53SkJQWGlXQkJVeVlnZnNhT2RkOXlRNWk0SUFuYm1CdFpwVT0meVVNV09rSXlzMi9pcGMwZkkrRzFncGdqTVVBPQ==; _routing_id="455c04bb-0662-4767-b948-aff8d687fe20"',
}

params = (
    ('source_url', '/search/pins/?q=Garden%20ideas'),
    ('data', '{"options":{"page_size":Icerik_Sayisi,"query":"Garden ideas","scope":"pins","bookmarks":["Y2JVSG81V2sxcmNHRlpWM1J5VFVaU1ZWRlVSbGhXTVVreVZUSXhSMVl3TVZoa1JGcFhVak5TVkZkV1pFZFdNa3BKVW14d1RrMXRhRkZXVjNCSFVtc3hWMXBHYkdwU00wSnpXVmh3YzFKc1pGbGpSVTVWWWtWd1IxWnNVa2RYUmxsNlVXeGtZVlpzY0ROVmJGcHJWbFpTY2s1V1pGTldXRUYzVm1wS01GVXlTbkpOVlZwUFZsWmFjRlZxVGtOVlZscHlWbXRhYTAxV1NsZFdWelZMVkRGS1ZXSkZiRmRXYldoNlYxWmFTMU5HVm5WUmJHaFhaV3RhVVZkV1dsWk5Wa3BYVW14c1lWSlViRmhWYkdRelRXeGFSMWRzVG1oaVZscDVWREZhYjFVeVNsbGhTRkpXWWtaS1dGVnFSbUZqVmxKeFZHeEdWbFpFUVRWYWExcFhVMWRLTmxWdGVHbFdia0pLVmxSSmVFMUdVblJXYms1b1RUTkNXVlp0ZUV0VE1YQllZek5vVjFacmNGcFhhMVUxVkcxS1NWRnVaRmRTTTJoeVZtcEtSMVl5VGtaV2JHaHBWa1ZhVUZkc1kzaFViVlpIVld4a1ZtSlVWbkpVVlZKRFRsWmFWMVZyT1ZwV2EzQkhWVzF3WVZaV1dsZFRiVVpWVmxad2VsWnNXbk5PYkZKelkwZDRhVkpXYTNkV2EyTjRaREpOZVZKWVpFNVdWMmhXVmpCb1EyRkdWbkpXV0doUFZteEtXRlpYTVRCaFZrcDBaSHBLVm1KSGFETldSM2hLWkRKS1JWUnNhR2xYUlVwWlYxZDRWazFXV2xkVWJrWm9VbXhhYjFSV1duZFhiR1IwWkVWYVVGWnJTbE5WUmxGNFQwWndXRmRVUWxwbGJYaHpWRmR3V2s1Rk1VVlNWRTVQWld0Vk1GZFhjRUpPUlRWeFlYcE9XbUZyVmpWVWEyUlBZbFp3ZEZaVVNrNWlWbkJ4Vkd0U1lXSldiRmhXYld4YVlsVnNORlJ0TVVwa01XdzJZVWQwVDFaR1JqUlVNVkp5VGtVNVNGVlliRTVoYkd3MlYydFNjMkZGTlhWbFJUbFRWbTFSTkdaSFJURk9NbHBxV21wVmVVNUhVWHBhVjA1dFdtcGthMDFFUW0xT1ZHc3pUVEpWZVU1SFdYbE5lbGsxVFVSbmVVMVhVVEZPYWtKcVdXcG5lazlFWXpGWk1sRXpUbXByZWs5SFJUVk5SMWt5V1cxSk1VNHlVamhVYTFaWVprRTlQUT09fFVIbzVkMUpWVm0xUk0wNHlVM3BzUmxkVU1XWk9lbFptVEZSR09GbDZVWGhOYWtGNVdtMUZORmt5VVRWWmFtaHJUMFJHYlUweVJUQmFSMWw0V1dwbk1WbDZWbWxOVkZwdFRqSlNhRmxYV1RWT2FrMDFUVEpaTkU5RVRtcE9WRWt3VFRKSmQwOUVWVEZhVkdkNldsUlpORTVJZUU5U1ZtUTR8OTk5YjMwZjBkNzhmZTBkNDAzMTc5Nzc0OWIwMTAzOGVmNjcyYWFiMzcxNjU4Mjk5Mzg0ZjBkOTNjNmNmMTFlYnxORVd8"],"field_set_key":"unauth_react","no_fetch_context_on_resource":false},"context":{}}'),
    ('_', '1643040944443'),
)

response = requests.get('https://www.pinterest.co.uk/resource/BaseSearchResource/get/', headers=headers, params=params)