我试过了pip3 install torch --no-cache-dir，几秒钟后，我得到了这个：
Collecting torch
Downloading https://files.pythonhosted.org/packages/24/19/4804aea17cd136f1705a5e98a00618cb8f6ccc375ad8bfa437408e09d058/torch-1.4.0-cp36-cp36m-manylinux1_x86_64.whl (753.4MB)
100% |????????????????????????????????| 753.4MB 5.7MB/s
Exception:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/usr/lib/python3/dist-packages/pip/commands/install.py", line 342, in run
requirement_set.prepare_files(finder)
File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 620, in _prepare_file
session=self.session, hashes=hashes)
File "/usr/lib/python3/dist-packages/pip/download.py", line 821, in unpack_url
hashes=hashes
File "/usr/lib/python3/dist-packages/pip/download.py", line 663, in unpack_http_url
unpack_file(from_path, location, content_type, link)
File "/usr/lib/python3/dist-packages/pip/utils/__init__.py", line 617, in unpack_file
flatten=not filename.endswith('.whl')
File "/usr/lib/python3/dist-packages/pip/utils/__init__.py", …