pipenv: Unexpected Error Resolving Satisfiable Dependencies with Pipenv 11

Hi All!

When running pipenv lock on a Pipfile containing pandas==0.18.1 and pandas-datareader==0.5.0, pipenv errors out claiming that it can’t find a pandas version satisfying pandas==0.18.1,>=0.19.2, but pandas-datareader doesn’t require pandas>=0.19.2 until 0.6.0. In particular, pandas-datareader==0.5.0 has the following requirements:

INSTALL_REQUIRES = (
    ['pandas>=0.17.0', 'requests>=2.3.0', 'requests-file', 'requests-ftp']
)

I don’t see this behavior in earlier versions of pipenv. With pipenv 10.0, for example, the packages above resolve to the following reasonable-looking versions (hashes omitted for brevity):

        "certifi": {
            "version": "==2018.1.18"
        },
        "chardet": {
            "version": "==3.0.4"
        },
        "idna": {
            "version": "==2.6"
        },
        "numpy": {
            "version": "==1.14.2"
        },
        "pandas": {
            "version": "==0.18.1"
        },
        "pandas-datareader": {
            "version": "==0.5"
        },
        "python-dateutil": {
            "version": "==2.7.0"
        },
        "pytz": {
            "version": "==2018.3"
        },
        "requests": {
            "version": "==2.18.4"
        },
        "requests-file": {
            "version": "==1.4.3"
        },
        "requests-ftp": {
            "version": "==0.3.1"
        },
        "six": {
            "version": "==1.11.0"
        },
        "urllib3": {
            "version": "==1.22"
        }

System Info:

$ python -m pipenv.help

Pipenv version: '11.6.1'

Pipenv location: '/home/ssanderson/.virtualenvs/repro/local/lib/python2.7/site-packages/pipenv'

Python location: '/home/ssanderson/.virtualenvs/repro/bin/python'

Other Python installations in PATH:

2.7: /home/ssanderson/.virtualenvs/repro/bin/python2.7
2.7: /home/ssanderson/.virtualenvs/repro/bin/python2.7
2.7: /usr/bin/python2.7
3.5: /usr/bin/python3.5m
3.5: /usr/bin/python3.5
3.6: /usr/local/bin/python3.6m
3.6: /usr/local/bin/python3.6
3.6: /usr/local/bin/python3.6
3.6: /usr/local/bin/python3.6
2.7.12: /home/ssanderson/.virtualenvs/repro/bin/python
2.7.12: /usr/bin/python
2.7.12: /home/ssanderson/.virtualenvs/repro/bin/python2
2.7.12: /usr/bin/python2
3.5.2: /usr/bin/python3

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '0',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '4.13.0-36-generic',
 'platform_system': 'Linux',
 'platform_version': '#40~16.04.1-Ubuntu SMP Fri Feb 16 23:25:58 UTC 2018',
 'python_full_version': '2.7.12',
 'python_version': '2.7',
 'sys_platform': 'linux2'}

System environment variables:

rvm_version
XDG_SESSION_TYPE
VIRTUALENVWRAPPER_SCRIPT
VIRTUAL_ENV
SHELL
XDG_DATA_DIRS
CONSUL_HTTP_ADDR
PROJECTS_ROOT
WORKON_HOME
XDG_RUNTIME_DIR
_system_type
XDG_SESSION_ID
DESKTOP_SESSION
_system_version
rvm_path
USER
XDG_VTNR
PYTHONUNBUFFERED
PS1
XAUTHORITY
LANGUAGE
SHLVL
QT_QPA_PLATFORMTHEME
WINDOWID
EDITOR
TMUX_PLUGIN_MANAGER_PATH
XDG_SESSION_DESKTOP
EVENT_NOEPOLL
TMUX
GDMSESSION
XDG_SEAT_PATH
PIP_PYTHON_PATH
_
_system_name
XDG_GREETER_DATA_DIR
PKG_CONFIG_PATH
HOME
DISPLAY
LANG
VIRTUALENVWRAPPER_PYTHON
_system_arch
rvm_prefix
VTE_VERSION
VIRTUALENVWRAPPER_HOOK_DIR
LOGNAME
TMUX_PANE
GDM_LANG
XDG_SEAT
PATH
SSH_AGENT_PID
TERM
VIRTUALENVWRAPPER_WORKON_CD
XDG_SESSION_PATH
rvm_bin_path
SSH_AUTH_SOCK
VIRTUALENVWRAPPER_PROJECT_FILENAME
OLDPWD
PWD

Pipenv–specific environment variables:

Debug–specific environment variables:

PATH: /home/ssanderson/.virtualenvs/repro/bin:/home/ssanderson/.cargo/bin:/usr/local/heroku/bin:/home/ssanderson/bin:/home/ssanderson/.local/bin:/usr/local/bin:/usr/local/sbin:/home/ssanderson/.cargo/bin:/usr/local/heroku/bin:/home/ssanderson/bin:/home/ssanderson/.local/bin:/usr/local/bin:/usr/local/sbin:/home/ssanderson/bin:/home/ssanderson/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/ssanderson/.rvm/bin
SHELL: /bin/bash
EDITOR: emacs -nw
LANG: en_US.UTF-8
PWD: /home/ssanderson/quantopian/repro
VIRTUAL_ENV: /home/ssanderson/.virtualenvs/repro

Contents of Pipfile (‘/home/ssanderson/quantopian/repro/Pipfile’):

[[source]]

url = "https://pypi.python.org/simple"
verify_ssl = true
name = "pypi"


[requires]

python_version = "2.7"

[packages]

pandas-datareader = "==0.5"
pandas = "==0.18.1"

Expected result

I expected the Pipfile listed above to resolve to something like the set of dependencies that pipenv 10 finds successfully.

Actual result

pipenv appears to think that pandas-datareader always requires pandas>=0.19, which eventually causes a dependency resolution failure.

(repro) [~/quantopian/repro]$ pipenv lock --clear --verbose

Provide the steps to replicate (which usually at least includes the commands and the Pipfile).

Courtesy Notice: Pipenv found itself running within a virtual environment, so it will automatically use that environment, instead of creating its own for any project.
Locking [dev-packages] dependencies…
Using pip: -i https://pypi.python.org/simple

                          ROUND 1
Current constraints:

Finding the best candidates:

Finding secondary dependencies:
------------------------------------------------------------
Result of round 1: stable, done

Locking [packages] dependencies…
Using pip: -i https://pypi.python.org/simple

                          ROUND 1
Current constraints:
  pandas==0.18.1
  pandas-datareader==0.5

Finding the best candidates:
  found candidate pandas==0.18.1 (constraint was ==0.18.1)
  found candidate pandas-datareader==0.5 (constraint was ==0.5)

Finding secondary dependencies:
  pandas==0.18.1            requires numpy>=1.7.0, python-dateutil, pytz>=2011k
  pandas-datareader==0.5    requires lxml, pandas>=0.19.2, requests-file, requests-ftp, requests>=2.3.0, wrapt

New dependencies found in this round:
  adding [u'lxml', '', '[]']
  adding [u'numpy', '>=1.7.0', '[]']
  adding [u'pandas', '>=0.19.2', '[]']
  adding [u'python-dateutil', '', '[]']
  adding [u'pytz', '>=2011k', '[]']
  adding [u'requests', '>=2.3.0', '[]']
  adding [u'requests-file', '', '[]']
  adding [u'requests-ftp', '', '[]']
  adding [u'wrapt', '', '[]']
Removed dependencies in this round:
Unsafe dependencies in this round:
------------------------------------------------------------
Result of round 1: not stable

                          ROUND 2
Current constraints:
  lxml
  numpy>=1.7.0
  pandas==0.18.1,>=0.19.2
  pandas-datareader==0.5
  python-dateutil
  pytz>=2011k
  requests>=2.3.0
  requests-file
  requests-ftp
  wrapt

Finding the best candidates:
  found candidate lxml==4.1.1 (constraint was <any>)
  found candidate numpy==1.14.2 (constraint was >=1.7.0)
Using pip: -i https://pypi.python.org/simple

                          ROUND 1
Current constraints:
  pandas==0.18.1
  pandas-datareader==0.5

Finding the best candidates:
  found candidate pandas==0.18.1 (constraint was ==0.18.1)
  found candidate pandas-datareader==0.5 (constraint was ==0.5)

Finding secondary dependencies:
  pandas==0.18.1            requires numpy>=1.7.0, python-dateutil, pytz>=2011k
  pandas-datareader==0.5    requires lxml, pandas>=0.19.2, requests-file, requests-ftp, requests>=2.3.0, wrapt

New dependencies found in this round:
  adding [u'lxml', '', '[]']
  adding [u'numpy', '>=1.7.0', '[]']
  adding [u'pandas', '>=0.19.2', '[]']
  adding [u'python-dateutil', '', '[]']
  adding [u'pytz', '>=2011k', '[]']
  adding [u'requests', '>=2.3.0', '[]']
  adding [u'requests-file', '', '[]']
  adding [u'requests-ftp', '', '[]']
  adding [u'wrapt', '', '[]']
Removed dependencies in this round:
Unsafe dependencies in this round:
------------------------------------------------------------
Result of round 1: not stable

                          ROUND 2
Current constraints:
  lxml
  numpy>=1.7.0
  pandas==0.18.1,>=0.19.2
  pandas-datareader==0.5
  python-dateutil
  pytz>=2011k
  requests>=2.3.0
  requests-file
  requests-ftp
  wrapt

Finding the best candidates:
  found candidate lxml==4.1.1 (constraint was <any>)
  found candidate numpy==1.14.2 (constraint was >=1.7.0)

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 pandas==0.18.1,>=0.19.2
Tried: 0.3.0.beta.win32, 0.3.0.beta2.win32, 0.3.0.win-amd64, 0.3.0.win32, 0.4.0.win-amd64, 0.4.0.win32, 0.4.1.win-amd64, 0.4.1.win32, 0.4.2.win-amd64, 0.4.2.win32, 0.4.3.win-amd64, 0.4.3.win32, 0.5.0.win-amd64, 0.5.0.win32, 0.6.0.win-amd64, 0.6.0.win32, 0.6.1.win-amd64, 0.6.1.win32, 0.7.0rc1.win-amd64, 0.7.0rc1.win32, 0.7.0.win-amd64, 0.7.0.win32, 0.7.1.win-amd64, 0.7.1.win32, 0.7.2.win-amd64, 0.7.2.win32, 0.7.3.win-amd64, 0.7.3.win32, 0.8.0rc2.win-amd64, 0.8.0rc2.win32, 0.8.0.win-amd64, 0.8.0.win32, 0.8.1.win-amd64, 0.8.1.win32, 0.9.0.win-amd64, 0.9.0.win32, 0.9.1.win-amd64, 0.9.1.win32, 0.10.0.win-amd64, 0.10.0.win32, 0.10.1.win-amd64, 0.10.1.win32, 0.11.0.win-amd64, 0.11.0.win32, 0.12.0.win-amd64, 0.12.0.win32, 0.13.0.win-amd64, 0.13.0.win32, 0.13.1.win-amd64, 0.13.1.win32, 0.14.0.win-amd64, 0.14.0.win32, 0.14.1.win-amd64, 0.14.1.win32, 0.15.0.win-amd64, 0.15.0.win32, 0.15.1.win-amd64, 0.15.1.win32, 0.15.2.win-amd64, 0.15.2.win32, 0.1, 0.2b0, 0.2b1, 0.2, 0.3.0b0, 0.3.0b2, 0.3.0, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.5.0, 0.6.0, 0.6.1, 0.7.0rc1, 0.7.0rc1, 0.7.0, 0.7.0, 0.7.1, 0.7.1, 0.7.2, 0.7.2, 0.7.3, 0.7.3, 0.8.0rc1, 0.8.0rc1, 0.8.0rc2, 0.8.0rc2, 0.8.0, 0.8.0, 0.8.1, 0.8.1, 0.9.0, 0.9.0, 0.9.1, 0.9.1, 0.10.0, 0.10.0, 0.10.1, 0.10.1, 0.11.0, 0.11.0, 0.12.0, 0.12.0, 0.13.0, 0.13.1, 0.13.1, 0.14.0, 0.14.0, 0.14.0, 0.14.0, 0.14.0, 0.14.1, 0.14.1, 0.14.1, 0.14.1, 0.14.1, 0.14.1, 0.15.0, 0.15.0, 0.15.0, 0.15.0, 0.15.0, 0.15.0, 0.15.1, 0.15.1, 0.15.1, 0.15.1, 0.15.1, 0.15.1, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0
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 pandas==0.18.1,>=0.19.2
Tried: 0.3.0.beta.win32, 0.3.0.beta2.win32, 0.3.0.win-amd64, 0.3.0.win32, 0.4.0.win-amd64, 0.4.0.win32, 0.4.1.win-amd64, 0.4.1.win32, 0.4.2.win-amd64, 0.4.2.win32, 0.4.3.win-amd64, 0.4.3.win32, 0.5.0.win-amd64, 0.5.0.win32, 0.6.0.win-amd64, 0.6.0.win32, 0.6.1.win-amd64, 0.6.1.win32, 0.7.0rc1.win-amd64, 0.7.0rc1.win32, 0.7.0.win-amd64, 0.7.0.win32, 0.7.1.win-amd64, 0.7.1.win32, 0.7.2.win-amd64, 0.7.2.win32, 0.7.3.win-amd64, 0.7.3.win32, 0.8.0rc2.win-amd64, 0.8.0rc2.win32, 0.8.0.win-amd64, 0.8.0.win32, 0.8.1.win-amd64, 0.8.1.win32, 0.9.0.win-amd64, 0.9.0.win32, 0.9.1.win-amd64, 0.9.1.win32, 0.10.0.win-amd64, 0.10.0.win32, 0.10.1.win-amd64, 0.10.1.win32, 0.11.0.win-amd64, 0.11.0.win32, 0.12.0.win-amd64, 0.12.0.win32, 0.13.0.win-amd64, 0.13.0.win32, 0.13.1.win-amd64, 0.13.1.win32, 0.14.0.win-amd64, 0.14.0.win32, 0.14.1.win-amd64, 0.14.1.win32, 0.15.0.win-amd64, 0.15.0.win32, 0.15.1.win-amd64, 0.15.1.win32, 0.15.2.win-amd64, 0.15.2.win32, 0.1, 0.2b0, 0.2b1, 0.2, 0.3.0b0, 0.3.0b2, 0.3.0, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.5.0, 0.6.0, 0.6.1, 0.7.0rc1, 0.7.0rc1, 0.7.0, 0.7.0, 0.7.1, 0.7.1, 0.7.2, 0.7.2, 0.7.3, 0.7.3, 0.8.0rc1, 0.8.0rc1, 0.8.0rc2, 0.8.0rc2, 0.8.0, 0.8.0, 0.8.1, 0.8.1, 0.9.0, 0.9.0, 0.9.1, 0.9.1, 0.10.0, 0.10.0, 0.10.1, 0.10.1, 0.11.0, 0.11.0, 0.12.0, 0.12.0, 0.13.0, 0.13.1, 0.13.1, 0.14.0, 0.14.0, 0.14.0, 0.14.0, 0.14.0, 0.14.1, 0.14.1, 0.14.1, 0.14.1, 0.14.1, 0.14.1, 0.15.0, 0.15.0, 0.15.0, 0.15.0, 0.15.0, 0.15.0, 0.15.1, 0.15.1, 0.15.1, 0.15.1, 0.15.1, 0.15.1, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.15.2, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.0, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.1, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.16.2, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.0, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.17.1, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.0, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.18.1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0rc1, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.0, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.1, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.19.2, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0rc1, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.1, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.2, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.20.3, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0rc1, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.21.1, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0, 0.22.0q

About this issue

Original URL
State: closed
Created 6 years ago
Reactions: 1
Comments: 50 (34 by maintainers)

Commits related to this issue

add unit test for double pinned prerelease Fix #1696 Fix #1687 Reference #1693 Signed-off-by: Gaetan Semet <gaetan@xeberon.net> — committed to gsemet/pipenv by gsemet 6 years ago
add unit test for double pinned prerelease Fix #1696 Fix #1687 Reference #1693 Signed-off-by: Gaetan Semet <gaetan@xeberon.net> — committed to gsemet/pipenv by gsemet 6 years ago
add unit test for double pinned prerelease Fix #1696 Fix #1687 Reference #1693 Signed-off-by: Gaetan Semet <gaetan@xeberon.net> — committed to gsemet/pipenv by gsemet 6 years ago

Most upvoted comments

I was able to recreate this issue with `pipenv-resolver pandas-datareader==0.5.0 pandas==0.18.1", using:

$ pipenv --version
pipenv, version 11.6.1

I believe the source of the dependency conflict is in pipenv.patched.notpip.index.PackageFinder.find_requirement, with the value of ignore_compatiblity=True. (Which was recently changed with this patch, https://github.com/pypa/pipenv/commit/4e906e4bc0df095ed3d61d4d283af02c76ec76d2#diff-6793f5b689d9956dc9b6c175038b718dR491)

When ignore_compatibility is True, and the spec for pandas-datareader is pandas-datareader==0.5.0, the spec is ignored, and all available candidates that are listed on PyPI are considered. The best_candidate value in the find_requirements method is then set to 0.6.0, instead of 0.5.0, which adds a constraint of pandas>=0.19.2. The correct pandas constraint for pandas-datareader==0.5.0 is pandas>=0.17.0.

Here is a table of the expected constraints for pandas-datareader with links to the project’s setup.py:

pandas-datareader version	pandas contsraint	setup.py link
`0.5.0`	`>=0.17.0`	https://github.com/pydata/pandas-datareader/blob/331e3895c51326e87e69325e1a14f1e350cb832e/setup.py#L28
`0.6.0`	`>=0.19.0`	https://github.com/pydata/pandas-datareader/blob/0debb023ba90ec57b6dd134a2003cb07aeea66a4/setup.py#L17

The following patch, which sets the default value of find_requirements to False, allows a successful invocation of the pipenv-resolver pandas-datareader==0.5.0 pandas==0.18.1. (Clearing the depcache before re-running the command is also required.)

modified   pipenv/patched/notpip/index.py
@@ -488,7 +488,7 @@ class PackageFinder(object):
             dependency_versions
         )
 
-    def find_requirement(self, req, upgrade, ignore_compatibility=True):
+    def find_requirement(self, req, upgrade, ignore_compatibility=False):
         """Try to find a Link matching req
 
         Expects req, an InstallRequirement and upgrade, a boolean

I am not yet sure if changing that default value will break any other use cases, or cause a regression on https://github.com/pypa/pipenv/issues/1667, the issue which is mentioned in the patch that added the ignore_compatibility flag.

ehebert on Mar 13, 2018