Pytorch and torchvision CPU version install fails

Hello, I wanted to install CPU version of torch 1.6.0 and torchvision 0.7.0 it’s similar issue like #4422 and #4171 but in my case, pipenv unable to solve requirements even they are written in pipenv file

Issue description

Requirements check fails with expectation of pinned package version

Expected result

Torch and torchvision are installed

Actual result

Current constraints:
  torch==1.6.0+cpu from https://download.pytorch.org/whl/cpu/torch-1.6.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torch (from -r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 3))
  torchvision==0.7.0+cpu from https://download.pytorch.org/whl/cpu/torchvision-0.7.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torchvision (from -r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 2))

Finding the best candidates:
  found candidate https://download.pytorch.org/whl/cpu/torch-1.6.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torch (constraint was ==1.6.0+cpu)
  found candidate https://download.pytorch.org/whl/cpu/torchvision-0.7.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torchvision (constraint was ==0.7.0+cpu)

Finding secondary dependencies:
  https://download.pytorch.org/whl/cpu/torchvision-0.7.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torchvision requires numpy, pillow>=4.1.1, torch==1.6.0
  https://download.pytorch.org/whl/cpu/torch-1.6.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torch requires future, numpy

New dependencies found in this round:
  adding ['future', '', '[]']
  adding ['numpy', '', '[]']
  adding ['pillow', '>=4.1.1', '[]']
  adding ['torch', '==1.6.0', '[]']
Removed dependencies in this round:
------------------------------------------------------------
Result of round 1: not stable

                          ROUND 2                           
Current constraints:
  future (from torch==1.6.0+cpu->-r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 3))
  numpy (from torch==1.6.0+cpu->-r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 3))
  pillow>=4.1.1 (from torchvision==0.7.0+cpu->-r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 2))
  torch==1.6.0,==1.6.0+cpu from https://download.pytorch.org/whl/cpu/torch-1.6.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torch (from -r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 3))
  torchvision==0.7.0+cpu from https://download.pytorch.org/whl/cpu/torchvision-0.7.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torchvision (from -r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 2))

Finding the best candidates:
  found candidate future==0.18.2 (constraint was <any>)
  found candidate numpy==1.19.2 (constraint was <any>)
  found candidate pillow==8.0.1 (constraint was >=4.1.1)
  found candidate https://download.pytorch.org/whl/cpu/torch-1.6.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torch (constraint was ==1.6.0,==1.6.0+cpu)
  found candidate https://download.pytorch.org/whl/cpu/torchvision-0.7.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torchvision (constraint was ==0.7.0+cpu)

Finding secondary dependencies:
  numpy==1.19.2             requires -
  pillow==8.0.1             requires -
  https://download.pytorch.org/whl/cpu/torchvision-0.7.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torchvision requires numpy, pillow>=4.1.1, torch==1.6.0
  future==0.18.2            requires -
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/pipenv/resolver.py", line 807, in <module>
    main()
  File "/usr/lib/python3.6/site-packages/pipenv/resolver.py", line 803, in main
    parsed.requirements_dir, parsed.packages, parse_only=parsed.parse_only)
  File "/usr/lib/python3.6/site-packages/pipenv/resolver.py", line 785, in _main
    resolve_packages(pre, clear, verbose, system, write, requirements_dir, packages)
  File "/usr/lib/python3.6/site-packages/pipenv/resolver.py", line 753, in resolve_packages
    requirements_dir=requirements_dir,
  File "/usr/lib/python3.6/site-packages/pipenv/resolver.py", line 736, in resolve
    req_dir=requirements_dir
  File "/usr/lib/python3.6/site-packages/pipenv/utils.py", line 1386, in resolve_deps
    req_dir=req_dir,
  File "/usr/lib/python3.6/site-packages/pipenv/utils.py", line 1093, in actually_resolve_deps
    resolver.resolve()
  File "/usr/lib/python3.6/site-packages/pipenv/utils.py", line 808, in resolve
    results = self.resolver.resolve(max_rounds=environments.PIPENV_MAX_ROUNDS)
  File "/usr/lib/python3.6/site-packages/pipenv/patched/piptools/resolver.py", line 180, in resolve
    has_changed, best_matches = self._resolve_one_round()
  File "/usr/lib/python3.6/site-packages/pipenv/patched/piptools/resolver.py", line 268, in _resolve_one_round
    their_constraints.extend(self._iter_dependencies(best_match))
  File "/usr/lib/python3.6/site-packages/pipenv/patched/piptools/resolver.py", line 369, in _iter_dependencies
    "Expected pinned or editable requirement, got {}".format(ireq)
TypeError: Expected pinned or editable requirement, got torch==1.6.0,==1.6.0+cpu from https://download.pytorch.org/whl/cpu/torch-1.6.0%2Bcpu-cp36-cp36m-linux_x86_64.whl#egg=torch (from -r /tmp/pipenv9nl1jcq7requirements/pipenv-cwkg_khz-constraints.txt (line 3))

Steps to replicate

command pipenv lock -v

Pipfile contents

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]

[packages]
torch = {file = "https://download.pytorch.org/whl/cpu/torch-1.6.0%252Bcpu-cp37-cp37m-linux_x86_64.whl"}
torchvision = {file = "https://download.pytorch.org/whl/cpu/torchvision-0.7.0%252Bcpu-cp37-cp37m-linux_x86_64.whl"}

Pipenv version: '2020.8.13' Python version 3.6.10

I have tried also with latest python 3.8 version - but it does not change anything. Specifying version field in package settings also does not help

[MoRoBe-Work]

I use the line torch = {index = "pytorch", version = "==1.9.0+cu111"} under packages and torch.__version__ shows 1.9.0+cu111

Does this work for you as well?

[matsutakk]

It works😀 I got a step closer to graduation thanks to you.

Thank you so much!