Simple function for downloading small datasets

fetch.py

def fetch(url):
  import requests, gzip, os, hashlib, numpy, sys
    fp = os.path.join("/tmp", hashlib.md5(url.encode('utf-8')).hexdigest())
    if os.path.isfile(fp):
        with open(fp, "rb") as f:
            data = f.read()
    else:
        with open(fp, "wb") as f:
            data = requests.get(url).content
            f.write(data)
    return numpy.frombuffer(gzip.decompress(data), dtype=np.uint8).copy()