It is a simple python script which help you grab all leetcode problem by tags.

tags.py

import requests
import bs4
root_url = 'http://leetcode.com'
index_url = root_url + '/tag/dynamic-programming/'
def get_problem_number_by_tags():
    response = requests.get(index_url)
    soup = bs4.BeautifulSoup(response.text, "html5lib")
    table = soup.find('table')
    table_body = table.find('tbody')
    rows = table_body.find_all('tr')
    data = ""
    for row in rows:
        cols = row.find_all('td')
        cols = [ele.text.strip() for ele in cols]
        # data.append([ele for ele in cols if ele]) # Get rid of empty values
        # data.append([cols[1]])
        data += cols[1]
        data += "\n"
    return data

print(get_problem_number_by_tags())