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# Author: Jiawei Liu
# Date: 2024-12-5
# -----------------------------------------------------------------------------
'''
Download script for Germany TST
To run:
`python Germany_TST/download_script/download.py`
'''
import requests
from bs4 import BeautifulSoup
from tqdm import tqdm
from pathlib import Path
from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry
def build_session(
max_retries: int = 3,
backoff_factor: int = 2,
session: requests.Session = None
) -> requests.Session:
"""
Build a requests session with retries
Args:
max_retries (int, optional): Number of retries. Defaults to 3.
backoff_factor (int, optional): Backoff factor. Defaults to 2.
session (requests.Session, optional): Session object. Defaults to None.
"""
session = session or requests.Session()
adapter = HTTPAdapter(max_retries=Retry(total=max_retries, backoff_factor=backoff_factor))
session.mount("http://", adapter)
session.mount("https://", adapter)
session.headers.update({
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"
})
return session
def main():
"""
Download Germany TST (https://www.mathe-wettbewerbe.de/aufgaben#t-internationale-mathematik-olympiade)
"""
output_dir = Path(__file__).parent.parent / "raw"
output_dir.mkdir(parents=True, exist_ok=True)
# Build a requests session with retries
req_session = build_session()
# Get all year list
resp = req_session.get('https://www.mathe-wettbewerbe.de/aufgaben#t-internationale-mathematik-olympiade')
soup = BeautifulSoup(resp.text, 'html.parser')
germ_tst_list_ele = soup.find_all('article')[1]
for sec_ele in tqdm(germ_tst_list_ele.find_all('section')):
year = sec_ele.find('button').get_text(strip=True)
resources = sec_ele.find_all('a')
with_problems = [_['href'] for _ in resources if "Auswahlklausuren" in _.get_text(strip=True)]
with_solutions = [_['href'] for _ in resources if "Lösungen" in _.get_text(strip=True)]
# Give priority to download those with solution.
if len(with_solutions) != 0:
download_pdfs = with_solutions
else:
download_pdfs = with_problems
for uri in download_pdfs:
output_file = output_dir / f"de-{year}-{Path(uri).name}"
# Skip if already downloaded
if output_file.exists():
continue
pdf_resp = req_session.get("https://www.mathe-wettbewerbe.de" + uri)
if pdf_resp.status_code != 200:
print(f"Year {year} Failed to download: {uri}")
continue
output_file.write_bytes(pdf_resp.content)
if __name__ == "__main__":
main()
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