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#!/usr/bin/python
import json
import shutil
from pathlib import Path
from typing import Any, Iterable
import httpx
import polars as pl
import tqdm
########
# main #
########
def main() -> None:
path = Path(__file__).parent / ".." / "data"
load_print("Reading data...")
data = read_data(path)
urls = extract_image_urls(data)
done_print("Read data.")
load_print("Downloading images...")
urls = download_images(urls, path)
with open(path / "images" / "urls.json", "w") as f:
json.dump(urls, f, indent=2)
done_print("Downloaded images.")
def read_data(path: Path) -> pl.DataFrame:
return pl.read_csv(path / "alloprof.csv").with_columns(
[
pl.col("subject").str.split(";"),
pl.col("grade").str.split(";"),
pl.col("images").str.split(";"),
pl.col("relevant").str.split(";"),
pl.col("possible").str.split(";"),
]
)
def extract_image_urls(data: pl.DataFrame) -> dict[str, int]:
return {
url: i
for i, url in enumerate(
set().union(*(set(row) for row in data["images"]))
)
}
def download_images(urls: dict[str, int], path: Path) -> dict[str, int]:
path = path / "images"
path.mkdir(exist_ok=True)
missing: list[str] = []
for url, id_ in load_progress(urls.items(), "Downloading images..."):
extension = url.split(".")[-1]
if extension in ("jpg", "jpeg", "png"):
with httpx.stream("GET", url) as resp:
if resp.status_code == 200:
with open(path / f"{id_}.{extension}", "wb") as f:
for chunk in resp.iter_bytes():
if chunk:
f.write(chunk)
else:
missing = [*missing, url]
else:
missing = [*missing, url]
return {url: id_ for url, id_ in urls.items() if url not in missing}
#########
# utils #
#########
def load_print(text: str, symbol: str = "*") -> None:
symbol = f"\033[1m[{symbol}]\033[0m"
print(
f"\r{symbol} {text}".ljust(shutil.get_terminal_size().columns),
end="\r",
)
def done_print(text: str, symbol: str = "+") -> None:
symbol = f"\033[1m\033[92m[{symbol}]\033[0m"
print(f"\r{symbol} {text}".ljust(shutil.get_terminal_size().columns))
def load_progress(
iter_: Iterable[Any],
text: str,
symbol: str = "*",
*args: Any,
**kwargs: Any,
) -> Iterable[Any]:
symbol = f"\033[1m[{symbol}]\033[0m"
return tqdm.tqdm(
iter_,
f"\r{symbol} {text}",
*args,
leave=False,
**kwargs,
)
if __name__ == "__main__":
main()
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