Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

pipenv install behaves different if using >= instead of ==

See original GitHub issue

tl;dr pipenv compares version strings differently if install parameter has version selection operator >=, e.g. >=4.0b vs. ==4.0b.

Running pipenv install 'pyyaml>=4.2b1' within a pipenv virtual environment fails with message Could not find a version that matches pyyaml>=4.2b1.

`pipenv install 'pyyaml>=4.2b1'` output

PS> mkdir test8
PS> cd test8
PS> pipenv --version
pipenv, version 2018.11.26

PS> pipenv shell
Creating a virtualenv for this project…
Pipfile: C:\Users\user1\Projects\test8\Pipfile
Using c:\python\python37\python.exe (3.7.1) to create virtualenv…
[   =] Creating virtual environment...Already using interpreter c:\python\python37\python.exe
Using base prefix 'c:\\python\\python37'
New python executable in C:\Users\user1\.virtualenvs\test8-PXjge-vL\Scripts\python.exe
Installing setuptools, pip, wheel...
done.

Successfully created virtual environment!
Virtualenv location: C:\Users\user1\.virtualenvs\test8-PXjge-vL
Creating a Pipfile for this project…
Launching subshell in virtual environment…
Windows Powershell 5.1.17763.316
Copyright (C) Microsoft Corporation. All rights reserved.

PS> pipenv install 'pyyaml>=4.2b1'
Installing pyyaml>=4.2b1…
Adding pyyaml to Pipfile's [packages]…
Installation Succeeded
Pipfile.lock not found, creating…
Locking [dev-packages] dependencies…
Locking [packages] dependencies…
Locking Failed!
[pipenv.exceptions.ResolutionFailure]:       req_dir=requirements_dir
[pipenv.exceptions.ResolutionFailure]:   File "c:\python\python37\lib\site-packages\pipenv\utils.py", line 726, in resolve_deps
[pipenv.exceptions.ResolutionFailure]:       req_dir=req_dir,
[pipenv.exceptions.ResolutionFailure]:   File "c:\python\python37\lib\site-packages\pipenv\utils.py", line 480, in actually_resolve_deps
[pipenv.exceptions.ResolutionFailure]:       resolved_tree = resolver.resolve()
[pipenv.exceptions.ResolutionFailure]:   File "c:\python\python37\lib\site-packages\pipenv\utils.py", line 395, in resolve
[pipenv.exceptions.ResolutionFailure]:       raise ResolutionFailure(message=str(e))
[pipenv.exceptions.ResolutionFailure]:       pipenv.exceptions.ResolutionFailure: ERROR: ERROR: Could not find a version that matches pyyaml>=4.2b1
[pipenv.exceptions.ResolutionFailure]:       Tried: 3.10, 3.10, 3.11, 3.11, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13
[pipenv.exceptions.ResolutionFailure]:       Skipped pre-versions: 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 4.2b1, 4.2b2, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 5.1b1, 5.1b3
[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  First try clearing your dependency cache with $ pipenv lock --clear, then try the original command again.
 Alternatively, you can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: ERROR: Could not find a version that matches pyyaml>=4.2b1
Tried: 3.10, 3.10, 3.11, 3.11, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13
Skipped pre-versions: 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 4.2b1, 4.2b2, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 5.1b1, 5.1b3
There are incompatible versions in the resolved dependencies.
[pipenv.exceptions.ResolutionFailure]:   File "c:\python\python37\lib\site-packages\pipenv\utils.py", line 726, in resolve_deps
[pipenv.exceptions.ResolutionFailure]:       req_dir=req_dir,
[pipenv.exceptions.ResolutionFailure]:   File "c:\python\python37\lib\site-packages\pipenv\utils.py", line 480, in actually_resolve_deps
[pipenv.exceptions.ResolutionFailure]:       resolved_tree = resolver.resolve()
[pipenv.exceptions.ResolutionFailure]:   File "c:\python\python37\lib\site-packages\pipenv\utils.py", line 395, in resolve
[pipenv.exceptions.ResolutionFailure]:       raise ResolutionFailure(message=str(e))
[pipenv.exceptions.ResolutionFailure]:       pipenv.exceptions.ResolutionFailure: ERROR: ERROR: Could not find a version that matches pyyaml>=4.2b1
[pipenv.exceptions.ResolutionFailure]:       Tried: 3.10, 3.10, 3.11, 3.11, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13
[pipenv.exceptions.ResolutionFailure]:       Skipped pre-versions: 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 4.2b1, 4.2b2, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 5.1b1, 5.1b3
[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  First try clearing your dependency cache with $ pipenv lock --clear, then try the original command again.
 Alternatively, you can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: ERROR: Could not find a version that matches pyyaml>=4.2b1
Tried: 3.10, 3.10, 3.11, 3.11, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.12, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13, 3.13
Skipped pre-versions: 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13b1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 3.13rc1, 4.2b1, 4.2b2, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 4.2b4, 5.1b1, 5.1b3
There are incompatible versions in the resolved dependencies.

Yet pipenv install 'pyyaml==4.2b1' succeeds

`pipenv install 'pyyaml==4.2b1' output

PS> pipenv install 'pyyaml==4.2b1'
Installing pyyaml==4.2b1…
Adding pyyaml to Pipfile's [packages]…
Installation Succeeded
Pipfile.lock not found, creating…
Locking [dev-packages] dependencies…
Locking [packages] dependencies…
Success!
Updated Pipfile.lock (bf53d5)!
Installing dependencies from Pipfile.lock (bf53d5)…
  ================================ 1/1 - 00:00:02

Problems I see:

pipenv appears to behave differently for version selection operator >=
pipenv does not log the version it parsed. I don’t know if pipenv parsed the passed version value as 4.2b1 or =4.2b1 or >=4.2b1 or something else.

Similar to Issue #3568 (and others).

$ pipenv --support

Pipenv version: '2018.11.26'

Pipenv location: 'c:\\python\\python37\\lib\\site-packages\\pipenv'

Python location: 'c:\\python\\python37\\python.exe'

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.7.1',
 'os_name': 'nt',
 'platform_machine': 'AMD64',
 'platform_python_implementation': 'CPython',
 'platform_release': '10',
 'platform_system': 'Windows',
 'python_full_version': '3.7.1',
 'python_version': '3.7',
 'sys_platform': 'win32'}

Pipenv–specific environment variables:

PIPENV_ACTIVE: 1

Debug–specific environment variables:

VIRTUAL_ENV: C:\Users\user1\.virtualenvs\test8-PXjge-vL

Contents of Pipfile (‘C:\Users\user1\OneDrive\Projects\test8\Pipfile’):

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

[dev-packages]

[packages]
pyyaml = "==4.2b1"

[requires]
python_version = "3.7"

Contents of Pipfile.lock (‘C:\Users\user1\OneDrive\Projects\test8\Pipfile.lock’):

{
    "_meta": {
        "hash": {
            "sha256": "d040cd80066475107689295402b3ff9aef71f7cdf6f1b795ab0f19a26dbf53d5"
        },
        "pipfile-spec": 6,
        "requires": {
            "python_version": "3.7"
        },
        "sources": [
            {
                "name": "pypi",
                "url": "https://pypi.org/simple",
                "verify_ssl": true
            }
        ]
    },
    "default": {
        "pyyaml": {
            "hashes": [
                "sha256:2c6b1522d651e6264cec4e3d59eda497aec576ce4f39d389ed77dc6c3748c598",
                "sha256:ef3a0d5a5e950747f4a39ed7b204e036b37f9bddc7551c1a813b8727515a832e"
            ],
            "index": "pypi",
            "version": "==4.2b1"
        }
    },
    "develop": {}
}