Error when adding package: EmptyConstraint instance has no attribute 'min' #534

bi1yeu · 2018-10-19T16:11:20Z

I am on the latest Poetry version.
I have searched the issues of this repo and believe that this is not a duplicate.
If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

OS version and name: macOS 10.13.6
Poetry version: 0.12.3
Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/bi1yeu/41b2180afd838560daa0faf68e9c236b

Issue

Hi! This is my first time attempting to use poetry. I created a new empty project with this command:

$ poetry new example

Then, from within the example directory, I attempt to add the jupyter package:

$ poetry add jupyter
Using version ^1.0 for jupyter

Updating dependencies
Resolving dependencies... (4.0s)

[AttributeError]
EmptyConstraint instance has no attribute 'min'

add [-D|--dev] [--git GIT] [--path PATH] [-E|--extras EXTRAS] [--optional] [--python PYTHON] [--platform PLATFORM] [--allow-prereleases] [--dry-run] [--] <name> (<name>)...

Verbose output is contained within the gist linked above. I am able to add other packages without apparent error. Happy to provide additional info.

The text was updated successfully, but these errors were encountered:

bi1yeu · 2018-10-19T17:27:39Z

Update: When I use pyenv to explicitly set the local Python version to 3 (I tried both 3.6.5 and 3.7.0), I am able to add the jupyter package.

$ poetry new example
$ cd example
$ pyenv local 3.6.5
$ poetry add jupyter # installs fine

This fails with the same AttributeError as above if I instead use pyenv local 2.7.10.

I can install jupyter directly using pip and Python 2.7:

$ mkdir example
$ cd example
$ pyenv local 2.7.10
$ python -m pip install --upgrade pip
$ python -m pip install jupyter # installs fine

sdispater · 2018-10-19T22:00:48Z

There was an issue when parsing some transitive markers. It has been fixed in commit 7761867

sdispater · 2018-10-22T23:08:04Z

This has been fixed in the latest release.

bi1yeu · 2018-10-22T23:23:22Z

Thank you!

…

On Mon, Oct 22, 2018 at 7:08 PM Sébastien Eustace ***@***.***> wrote: Closed #534 <#534>. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#534 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABIVaXpKGlHCIOw-6UzEPNG3vjhOTMs-ks5unk_VgaJpZM4XwqLv> .

flaviut · 2019-07-11T14:50:33Z

I think there's been a regression here; I get the same error with 0.12.16:

$ poetry -V
Poetry 0.12.16
$ poetry add jupyter
                                                   
[AttributeError]                    
'EmptyConstraint' object has no attribute 'min'  
                                                   
add [-D|--dev] [--git GIT] [--path PATH] [-E|--extras EXTRAS] [--optional] [--python PYTHON] [--platform PLATFORM] [--allow-prereleases] [--dry-run] [--] <name> (<name>)...

nc7s · 2019-08-10T15:59:04Z

Got the same error with 0.12.17 & Python version 3.7.4; same prompt as @flaviut 's comment.

It seems to be create_nested_marker() missing EmptyConstraint when checking the type of constraint. Manual patching ~/.poetry/lib/poetry/packages/utils/utils.py to import poetry.semver.empty_constraint.EmptyConstraint and add it to check list said above solved the problem locally.

agilgur5 · 2019-09-10T04:14:03Z

Also getting this error with Poetry 0.12.17. Can we re-open this issue?

~~@mwoyuan to which check (line #?) did you add EmptyConstraint? Maybe submit a PR if you were able to patch it?~~
EDIT: added EmptyConstraint import after line 9:

from poetry.semver import Version
from poetry.semver import VersionUnion
from poetry.semver.empty_constraint import EmptyConstraint  # this line is new

and a new if statement after line 206/207:

    elif isinstance(constraint, Version):
        marker = '{} == "{}"'.format(name, constraint.text)
    elif isinstance(constraint, EmptyConstraint):  # and this line
        marker = ''  # and this one
    else:

And now it seems to work ok

laike9m · 2020-02-03T00:24:24Z

Met this issue on Poetry 1.0.3 + Python 3.7.4

andreoliwa · 2020-06-23T23:55:28Z

I'm having the same error on Poetry 1.0.9.

The package I'm trying (AuHau/toggl-cli) has:

python_requires = >=3.6.0, <3.9.0

This is my debug info, and a gist below with pyproject.toml and the full error log.

Poetry
Version: 1.0.9
Python:  3.8.3

Virtualenv
Python:         3.8.3
Implementation: CPython
Path:           /Users/wagneraugusto/Library/Caches/pypoetry/virtualenvs/toggl-cli-bug-t9z0mPRw-py3.8
Valid:          True

System
Platform: darwin
OS:       posix
Python:   /Users/wagneraugusto/.pyenv/versions/3.8.3

Poetry [AttributeError] 'EmptyConstraint' object has no attribute 'min'

glencairn · 2021-03-03T21:09:58Z

I'm experiencing this same issue with Poetry 1.1.4 when trying to install certain packages. I was able to get around the issue following a similar approach that @bnoctis and @agilgur5 detailed above. However, for a more recent vendorized install, the file I had to modify was ~/.poetry/lib/poetry/_vendor/py3.8/poetry/core/packages/dependency.py (where python3.8 is my active interpreter).

Here's a diff of the modifications I made, hopefully others find this useful:

diff --git a/tmp.py b/Users/user/.poetry/lib/poetry/_vendor/py3.8/poetry/core/packages/dependency.py
index e118794..6f97002 100644
--- a/tmp.py
+++ b/Users/user/.poetry/lib/poetry/_vendor/py3.8/poetry/core/packages/dependency.py
@@ -9,6 +9,7 @@ from poetry.core.semver import Version
 from poetry.core.semver import VersionConstraint
 from poetry.core.semver import VersionRange
 from poetry.core.semver import VersionUnion
+from poetry.core.semver import EmptyConstraint
 from poetry.core.semver import parse_constraint
 from poetry.core.version.markers import AnyMarker
 from poetry.core.version.markers import parse_marker
@@ -291,6 +292,8 @@ class Dependency(PackageSpecification):
                 name = "python_full_version"
 
             marker = '{} == "{}"'.format(name, constraint.text)
+        elif isinstance(constraint, EmptyConstraint):
+            marker = ''
         else:
             if constraint.min is not None:
                 min_name = name

System: MacOS
Poetry: 1.1.4

leikoilja · 2021-03-13T08:11:38Z

Flip, tool me good 30 mins to fix it.
MacOS M1, Poetry 1.1.5, Python 3.9.2 (darwin)
Had to do both those fixes as mentioned above by @glencairn and @bnocti, @agilgur5

Ver1Sus · 2021-03-26T08:11:46Z

Like @glencairn comment, but this works for me:

        elif constraint.is_empty():
            marker = ''

System: Ubuntu 20
Poetry: 1.0.1
Python: 2.7

P.S. Iam not sure, but this package was causing an error backports.functools-lru-cache (1.6.3)

pksol · 2021-03-31T09:32:58Z

Thanks, @Ver1Sus!
backports.functools-lru-cache was causing problems for me as well and fixating its version to 1.6.1 fixed it.

Tell me, how did you know that the problem was with this particular package? I'm wondering since it might happen again with another package.

gjedlicska · 2021-04-01T20:31:54Z

Same issue here, my poetry debug is

Poetry
Version: 1.1.5
Python:  3.8.8

Virtualenv
Python:         3.8.8
Implementation: CPython
Path:           /home/gergojedlicska/.cache/pypoetry/virtualenvs/prjectproject-kXrNwMJU-py3.8
Valid:          True

System
Platform: linux
OS:       posix
Python:   /home/gergojedlicska/.asdf/installs/python/3.8.8

willfrey · 2021-04-02T05:45:15Z

This is also happening due to a change in pytest-randomly, FWIW.

Ver1Sus · 2021-04-02T10:41:23Z

@pksol, I'm glad that the solution helped!

I ran poetry update -vvv with verbose, and poetry pointed out the problematic package:

PyPI: 8 packages found for backports.functools-lru-cache >=1.2.1
 1 packages found for backports.functools-lru-cache >=1.2.1
   1: Version solving took 40.500 seconds.
   1: Tried 1 solutions.

[AttributeError]
EmptyConstraint instance has no attribute 'min'

dem1tris · 2021-04-02T13:16:00Z

#3862
Temporary workaround: pin pytest-randomly = "3.5.0"

jamie--stewart · 2021-04-05T14:12:38Z

I'm seeing the same issue as @glencairn identified:

macOs 11.0.1
poetry 1.1.15
python 3.8.7

The patch they identified has fixed my issue.

Can anyone guide me on how to identify the offending package? I think we may need to raise a fresh issue here as it seems like whatever causes this has not been resolved, or resurfaced

gatoniel · 2021-04-06T08:35:20Z

I encountered the same issue and the solution of @glencairn solved the problem. My poetry debug is:

Poetry
Version: 1.1.5
Python:  3.8.8

Virtualenv
Python:         3.8.8
Implementation: CPython
Path:           /home/netter/.cache/pypoetry/virtualenvs/stereographic-link-prediction-ra14Y8Aq-py3.8
Valid:          True

System
Platform: linux
OS:       posix
Python:   /home/netter/miniconda3

dycw · 2021-04-07T06:06:01Z

I found @dem1tris's solution to be helpful - I changed pytest-randomly = "^3.5" to "3.5.0".

tony · 2021-04-11T15:40:47Z

backports.functools-lru-cache was causing problems for me as well and fixating its version to 1.6.1 fixed it.

via @pksol at #534 (comment)

poetry update gives me the EmptyConstraint error at Poetry 1.0.10

pyflakes gave me this via flake8

tony · 2021-04-11T15:49:24Z

Follow up

If your issue in backports.functools_lru_cache:

Workaround: @pbzweihander's fix here helped me in pyproject.toml:

"backports.functools_lru_cache" = "!=1.6.2,!=1.6.3" # https://github.com/jaraco/backports.functools_lru_cache/pull/16

There is a PR to fix this here: jaraco/backports.functools_lru_cache#16

See also: - python-poetry/poetry#534 - jaraco/backports.functools_lru_cache#16 - spoqa/requests-backoff@2436d62

mforbes · 2021-05-07T00:01:53Z

I was having this error because of misinterpreting the docs with a constraint like python = ^2.7,^3.6 where the comma appears to mean logical and. Instead, I needed python = ^2.7 || ^3.6 as discussed in issue #2372.

elicutler · 2021-08-19T13:32:11Z

I had to edit ~/.poetry/lib/poetry/_vendor/py3.8/poetry/core/version/markers.py

from poetry.core.packages.constraints.empty_constraint import EmptyConstraint

and line 281 in the definition of validate(self, environment), added:

if isinstance(self._constraint, EmptyConstraint):
    return True

mdengler · 2021-08-19T17:23:22Z

I had to edit ~/.poetry/lib/poetry/_vendor/py3.8/poetry/core/version/markers.py
[...]

I opened an issue for this specific error: #4410

Mazyod · 2021-08-24T07:12:51Z

I had to edit ~/.poetry/lib/poetry/_vendor/py3.8/poetry/core/version/markers.py
from poetry.core.packages.constraints.empty_constraint import EmptyConstraint
and line 281 in the definition of validate(self, environment), added:
if isinstance(self._constraint, EmptyConstraint):
    return True

Just to avoid the import in my case, I used not hasattr(self._constraint, "allows")

(Or update to version 1.1.8, it apparently fixed the issue)

dsm0014 · 2021-08-24T17:51:30Z

Encountered this issue with poetry version 1.1.7.
In my experience, I can confirm updating to version 1.1.8 resolves this issue.

iXanthos · 2021-12-12T13:28:19Z

This issue still persists at poetry 1.1.12. When running poetry add --dev pytest pytest-cov black isort flake8 bandit safety

github-actions · 2024-03-02T17:04:32Z

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

sdispater added the kind/bug Something isn't working as expected label Oct 19, 2018

sdispater closed this as completed Oct 22, 2018

agilgur5 mentioned this issue Oct 13, 2019

Add Tests, CI, and Matrix for different Django and Python versions, Fix compat issues found in Matrix agilgur5/django-serializable-model#6

Merged

andreoliwa mentioned this issue Jun 24, 2020

AttributeError on running "poetry install" #2372

Closed

3 tasks

This was referenced Apr 2, 2021

Fix python version constraint for pytest-mypy jaraco/backports.functools_lru_cache#16

Merged

Resolve invalid python version constraint python-poetry/poetry-core#154

Closed

bstadlbauer mentioned this issue Apr 2, 2021

Bugfix duplicate dataclass attributes mkdocstrings/pytkdocs#100

Merged

tony added a commit to vcs-python/libvcs that referenced this issue Apr 11, 2021

Update packages, fix backports.functools_lru_cache

d08b1e2

See also: - python-poetry/poetry#534 - jaraco/backports.functools_lru_cache#16 - spoqa/requests-backoff@2436d62

mforbes mentioned this issue May 7, 2021

Document use of current conda env #1724

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Error when adding package: EmptyConstraint instance has no attribute 'min' #534

Error when adding package: EmptyConstraint instance has no attribute 'min' #534

bi1yeu commented Oct 19, 2018

bi1yeu commented Oct 19, 2018

sdispater commented Oct 19, 2018

sdispater commented Oct 22, 2018

bi1yeu commented Oct 22, 2018 via email

flaviut commented Jul 11, 2019

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Ver1Sus commented Mar 26, 2021

pksol commented Mar 31, 2021

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Error when adding package: EmptyConstraint instance has no attribute 'min' #534

Error when adding package: EmptyConstraint instance has no attribute 'min' #534

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bi1yeu commented Oct 19, 2018

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bi1yeu commented Oct 19, 2018

sdispater commented Oct 19, 2018

sdispater commented Oct 22, 2018

bi1yeu commented Oct 22, 2018 via email

flaviut commented Jul 11, 2019

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