Pipenv: version conflicts should indicate which dependencies have conflicting requirements

[radix]

When I run pipenv install and there's a conflict in versions, it doesn't tell me what caused those conflicting versions. This makes it unnecessarily difficult to figure out what's wrong with the dependency graph.

Expected result

Warning: your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.

- Pipfile requires requests ==2.9.1
- someotherdep requires requests >=2.18.0
- anotherdep (dependency of yetanotherdep) requires requests <=2.0

Actual result

Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  You can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
Could not find a version that matches requests==2.9.1,>=2.18.0
Tried: 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.0, 0.4.1, 0.5.0, 0.5.1, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.4, 0.7.5, 0.7.6, 0.8.0, 0.8.1, 0.8.2, 0.8.3, 0.8.4, 0.8.5, 0.8.6, 0.8.7, 0.8.8, 0.8.9, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.10.4, 0.10.6, 0.10.7, 0.10.8, 0.11.1, 0.11.2, 0.12.0, 0.12.1, 0.13.0, 0.13.1, 0.13.2, 0.13.3, 0.13.4, 0.13.5, 0.13.6, 0.13.7, 0.13.8, 0.13.9, 0.14.0, 0.14.1, 0.14.2, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 2.0.0, 2.0.0, 2.0.1, 2.0.1, 2.1.0, 2.1.0, 2.2.0, 2.2.0, 2.2.1, 2.2.1, 2.3.0, 2.3.0, 2.4.0, 2.4.0, 2.4.1, 2.4.1, 2.4.2, 2.4.2, 2.4.3, 2.4.3, 2.5.0, 2.5.0, 2.5.1, 2.5.1, 2.5.2, 2.5.2, 2.5.3, 2.5.3, 2.6.0, 2.6.0, 2.6.1, 2.6.1, 2.6.2, 2.6.2, 2.7.0, 2.7.0, 2.8.0, 2.8.0, 2.8.1, 2.8.1, 2.9.0, 2.9.0, 2.9.1,
2.9.1, 2.9.2, 2.9.2, 2.10.0, 2.10.0, 2.11.0, 2.11.0, 2.11.1, 2.11.1, 2.12.0, 2.12.0, 2.12.1, 2.12.1, 2.12.2,
2.12.2, 2.12.3, 2.12.3, 2.12.4, 2.12.4, 2.12.5, 2.12.5, 2.13.0, 2.13.0, 2.14.0, 2.14.0, 2.14.1, 2.14.1, 2.14.2, 2.14.2, 2.15.1, 2.15.1, 2.16.0, 2.16.0, 2.16.1, 2.16.1, 2.16.2, 2.16.2, 2.16.3, 2.16.3, 2.16.4, 2.16.4, 2.16.5, 2.16.5, 2.17.0, 2.17.0, 2.17.1, 2.17.1, 2.17.2, 2.17.2, 2.17.3, 2.17.3, 2.18.0, 2.18.0, 2.18.1, 2.18.1, 2.18.2, 2.18.2, 2.18.3, 2.18.3, 2.18.4, 2.18.4

[kennethreitz42]

pull requests accepted!

[kennethreitz42]

closing for #1693

[radix]

Hi, #1693 is unrelated to this issue. This issue is about the UX of having a mismatch in the dependency tree.

[erdnaxeli]

Can this issue be opened again?