Unable to install under Python 3.8

[BastianZim]

Issue: Cannot install under python 3.8

My issue:

UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:

Specifications:

  - weasyprint -> python[version='2.7.*|3.5.*|3.6.*|3.6.9|3.6.9|3.6.9|>=2.7,<2.8.0a0|>=3.5|>=3.6,<3.7.0a0|>=3.8,<3.9.0a0|>=3.5,<3.6.0a0|3.4.*|>3.5',build='1_73_pypy|2_73_pypy|0_73_pypy']
  - weasyprint -> python[version='>=3.7,<3.8.0a0']

Your python: python=3.8

But according to the Weasyprint website, it should be available for Python 3.5+

Environment (conda list):

``` $ conda list # packages in environment at /usr/local/anaconda3/envs/environment_name: # # Name Version Build Channel alabaster 0.7.12 py_0 applaunchservices 0.2.1 py_0 appnope 0.1.0 py38_1001 argh 0.26.2 py38_0 astroid 2.4.2 py38_0 atomicwrites 1.4.0 py_0 attrs 19.3.0 py_0 autopep8 1.5.4 py_0 babel 2.8.0 py_0 backcall 0.2.0 py_0 bleach 3.1.5 py_0 boto3 1.14.37 py_0 botocore 1.17.39 py_0 brotlipy 0.7.0 py38haf1e3a3_1000 ca-certificates 2020.6.20 hecda079_0 conda-forge certifi 2020.6.20 py38h32f6830_0 conda-forge cffi 1.14.1 py38hed5b41f_0 chardet 3.0.4 py38_1003 cloudpickle 1.5.0 py_0 cryptography 2.9.2 py38ha12b0ac_0 dbus 1.13.16 h18a8e69_0 decorator 4.4.2 py_0 defusedxml 0.6.0 py_0 diff-match-patch 20200713 py_0 docutils 0.15.2 py38_0 entrypoints 0.3 py38_0 expat 2.2.9 hb1e8313_2 flake8 3.8.3 py_0 future 0.18.2 py38_1 gettext 0.19.8.1 hb0f4f8b_2 glib 2.65.0 hc5f4afa_0 icu 58.2 h0a44026_3 idna 2.10 py_0 imagesize 1.2.0 py_0 importlib-metadata 1.7.0 py38_0 importlib_metadata 1.7.0 0 iniconfig 1.0.1 py_0 intervaltree 3.0.2 py_1 ipykernel 5.3.4 py38h5ca1d4c_0 ipython 7.17.0 py38h39e3cac_0 ipython_genutils 0.2.0 py38_0 isort 4.3.21 py38_0 jedi 0.15.2 py38_0 jinja2 2.11.2 py_0 jmespath 0.10.0 py_0 jpeg 9b he5867d9_2 jsonschema 3.2.0 py38_1 jupyter_client 6.1.6 py_0 jupyter_core 4.6.3 py38_0 keyring 21.3.0 py38_0 lazy-object-proxy 1.4.3 py38h1de35cc_0 libcxx 10.0.0 1 libedit 3.1.20191231 h1de35cc_1 libffi 3.3 hb1e8313_2 libiconv 1.16 h1de35cc_0 libpng 1.6.37 ha441bb4_0 libsodium 1.0.18 h1de35cc_0 libspatialindex 1.9.3 h0a44026_0 libxml2 2.9.10 h3b9e6c8_1 libxslt 1.1.34 h83b36ba_0 lxml 4.5.2 py38h63b7cb6_0 markupsafe 1.1.1 py38h1de35cc_1 mccabe 0.6.1 py38_1 mistune 0.8.4 py38h1de35cc_1001 more-itertools 8.4.0 py_0 nbconvert 5.6.1 py38_1 nbformat 5.0.7 py_0 ncurses 6.2 h0a44026_1 numpydoc 1.1.0 py_0 openssl 1.1.1g haf1e3a3_1 conda-forge packaging 20.4 py_0 pandoc 2.10 0 pandocfilters 1.4.2 py38_1 parso 0.5.2 py_0 pathtools 0.1.2 py_1 pcre 8.44 hb1e8313_0 pexpect 4.8.0 py38_1 pickleshare 0.7.5 py38_1001 pip 20.2.2 py38_0 pluggy 0.13.1 py38_0 prompt-toolkit 3.0.5 py_0 psutil 5.7.0 py38h1de35cc_0 ptyprocess 0.6.0 py38_0 py 1.9.0 py_0 pycodestyle 2.6.0 py_0 pycparser 2.20 py_2 pydocstyle 5.0.2 py_0 pyflakes 2.2.0 py_0 pygments 2.6.1 py_0 pylint 2.5.3 py38_0 pyopenssl 19.1.0 py_1 pypandoc 1.5 pyh9f0ad1d_0 conda-forge pyparsing 2.4.7 py_0 pyqt 5.9.2 py38h655552a_2 pyrsistent 0.16.0 py38h1de35cc_0 pysocks 1.7.1 py38_1 pytest 6.0.1 py38_0 python 3.8.5 h26836e1_0 python-dateutil 2.8.1 py_0 python-jsonrpc-server 0.3.4 py_1 python-language-server 0.31.9 py38_0 python.app 2 py38_10 python_abi 3.8 1_cp38 conda-forge pytz 2020.1 py_0 pyyaml 5.3.1 py38haf1e3a3_1 pyzmq 19.0.1 py38hb1e8313_1 qdarkstyle 2.8.1 py_0 qt 5.9.7 h468cd18_1 qtawesome 0.7.2 py_0 qtconsole 4.7.5 py_0 qtpy 1.9.0 py_0 readline 8.0 h1de35cc_0 requests 2.24.0 py_0 requests-file 1.5.1 py_0 rope 0.17.0 py_0 rtree 0.9.4 py38_1 s3transfer 0.3.3 py38_1 setuptools 49.3.1 py38_0 sip 4.19.8 py38h0a44026_0 six 1.15.0 py_0 snowballstemmer 2.0.0 py_0 sortedcontainers 2.2.2 py_0 sphinx 3.2.0 py_0 sphinxcontrib-applehelp 1.0.2 py_0 sphinxcontrib-devhelp 1.0.2 py_0 sphinxcontrib-htmlhelp 1.0.3 py_0 sphinxcontrib-jsmath 1.0.1 py_0 sphinxcontrib-qthelp 1.0.3 py_0 sphinxcontrib-serializinghtml 1.1.4 py_0 spyder 4.1.3 py38_0 spyder-kernels 1.9.3 py38_0 spyder-unittest 0.4.1 py_0 spyder-ide sqlite 3.32.3 hffcf06c_0 testpath 0.4.4 py_0 tk 8.6.10 hb0a8c7a_0 tldextract 2.2.0 py_0 conda-forge toml 0.10.1 py_0 tornado 6.0.4 py38h1de35cc_1 traitlets 4.3.3 py38_0 ujson 1.35 py38h1de35cc_0 urllib3 1.25.10 py_0 watchdog 0.10.3 py38haf1e3a3_0 wcwidth 0.2.5 py_0 webencodings 0.5.1 py38_1 wheel 0.34.2 py38_0 wrapt 1.11.2 py38h1de35cc_0 wurlitzer 2.0.1 py38_0 xz 5.2.5 h1de35cc_0 yaml 0.2.5 haf1e3a3_0 yapf 0.30.0 py_0 zeromq 4.3.2 hb1e8313_2 zipp 3.1.0 py_0 zlib 1.2.11 h1de35cc_3 Note: you may need to restart the kernel to use updated packages. ```

Details about conda and system ( conda info ):

``` $ conda info active environment : environment_name active env location : /usr/local/anaconda3/envs/environment_name shell level : 2 user config file : /Users/username/.condarc populated config files : /Users/username/.condarc conda version : 4.8.4 conda-build version : 3.18.11 python version : 3.7.7.final.0 virtual packages : __osx=10.15.6 base environment : /usr/local/anaconda3 (writable) channel URLs : https://repo.anaconda.com/pkgs/main/osx-64 https://repo.anaconda.com/pkgs/main/noarch https://repo.anaconda.com/pkgs/r/osx-64 https://repo.anaconda.com/pkgs/r/noarch package cache : /usr/local/anaconda3/pkgs /Users/username/.conda/pkgs envs directories : /usr/local/anaconda3/envs /Users/username/.conda/envs platform : osx-64 user-agent : conda/4.8.4 requests/2.24.0 CPython/3.7.7 Darwin/19.6.0 OSX/10.15.6 UID:GID : 501:20 netrc file : None offline mode : False Note: you may need to restart the kernel to use updated packages. ```

[liZe]

I dont know where this restriction comes from. There’s no restriction in the recipe:

https://github.com/conda-forge/weasyprint-feedstock/blob/master/recipe/meta.yaml

It’s probably the same problem as #3.

[BastianZim]

Yeah me neither as I couldn’t find it anywhere and wasn’t even sure if I should file it here.

Should I link this to the main conda repo?

[liZe]

Should I link this to the main conda repo?

If it can help.

[BastianZim]

Ok, will do as I cannot find a different cause.

[BastianZim]

Hi @liZe,

would you mind building and publishing the package again, as outlined in https://github.com/conda/conda/issues/10156#issuecomment-673769286, and see if that fixes it?

[BastianZim]

I've just created a pull request but not sure if I did it correctly since it's my first one. If it's incorrect, just delete it.