1. Problem phenomenon

Error reported by Ubuntu machine or docker container

Traceback (most recent call last):
  File "main.py", line 200, in <module>
  File "attribute_extract/extract_attribute.py", line 37, in __init__
  File "attribute_extract/models.py", line 25, in __init__
  File "torchvision/models/resnet.py", line 199, in resnet50
  File "torch/hub.py", line 433, in load_state_dict_from_url
  File "torch/hub.py", line 349, in _download_url_to_file
  File "urllib/request.py", line 162, in urlopen
  File "urllib/request.py", line 465, in open
  File "urllib/request.py", line 483, in _open
  File "urllib/request.py", line 443, in _call_chain
  File "urllib/request.py", line 1286, in https_open
  File "urllib/request.py", line 1245, in do_open
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645)>

2. Solutions

sudo apt-get update 
sudo apt-get install ca-certificates
sudo update-ca-certificates --fresh
export SSL_CERT_DIR=/etc/ssl/certs