in src/transformers/utils/model_utils.py [0:0]
def download(url, path=None, overwrite=False, sha1_hash=None):
"""Download an given URL
Parameters
----------
url : str
URL to download
path : str, optional
Destination path to store downloaded file. By default stores to the
current directory with same name as in url.
overwrite : bool, optional
Whether to overwrite destination file if already exists.
sha1_hash : str, optional
Expected sha1 hash in hexadecimal digits. Will ignore existing file when hash is specified
but doesn't match.
Returns
-------
str
The file path of the downloaded file.
"""
if path is None:
fname = url.split('/')[-1]
else:
path = os.path.expanduser(path)
if os.path.isdir(path):
fname = os.path.join(path, url.split('/')[-1])
else:
fname = path
if overwrite or not os.path.exists(fname) or (sha1_hash and not check_sha1(fname, sha1_hash)):
dirname = os.path.dirname(os.path.abspath(os.path.expanduser(fname)))
if not os.path.exists(dirname):
os.makedirs(dirname)
print('Downloading %s from %s...'%(fname, url))
r = requests.get(url, stream=True)
if r.status_code != 200:
raise RuntimeError("Failed downloading url %s"%url)
total_length = r.headers.get('content-length')
with open(fname, 'wb') as f:
if total_length is None: # no content length header
for chunk in r.iter_content(chunk_size=1024):
if chunk: # filter out keep-alive new chunks
f.write(chunk)
else:
total_length = int(total_length)
for chunk in tqdm(r.iter_content(chunk_size=1024),
total=int(total_length / 1024. + 0.5),
unit='KB', unit_scale=False, dynamic_ncols=True):
f.write(chunk)
if sha1_hash and not check_sha1(fname, sha1_hash):
raise UserWarning('File {} is downloaded but the content hash does not match. ' \
'The repo may be outdated or download may be incomplete. ' \
'If the "repo_url" is overridden, consider switching to ' \
'the default repo.'.format(fname))
return fname