import requests
from bs4 import BeautifulSoup


def get_video_ids(keyword, num_videos):
    video_ids = []
    page_num = (num_videos - 1) // 20 + 1
    base_url = "https://search.bilibili.com/all?keyword={}&order=totalrank&duration=0&tids_1=0&page={}"
    for page in range(1, page_num + 1):
        url = base_url.format(keyword, page)
        response = requests.get(url)
        soup = BeautifulSoup(response.text, 'html.parser')
        video_tags = soup.find_all('li', {'class': 'video-item matrix'})
        for tag in video_tags:
            video_id = tag.get('data - aid')
            if video_id:
                video_ids.append(video_id)
            if len(video_ids) >= num_videos:
                break
        if len(video_ids) >= num_videos:
            break
    return video_ids