"micromamba install" removes Python 3.13 and Pip 26

[ifrh]

micromamba version : 2.6.2

(d52py313) user@cd4c86aaf95f:~$ python -c "import cffi"

(d52py313) user@cd4c86aaf95f:~$ python -c "import ldap"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import ldap
  File "/home/user/micromamba/envs/d52py313/lib/python3.13/site-packages/ldap/__init__.py", line 34, in <module>
    import _ldap
ImportError: /usr/lib/x86_64-linux-gnu/libp11-kit.so.0: undefined symbol: ffi_type_pointer, version LIBFFI_BASE_7.0

(d52py313) user@cd4c86aaf95f:~$ pip freeze | grep ldap
python-ldap==3.4.7
(d52py313) user@cd4c86aaf95f:~$

(d52py313) user@f340759bba63:~$ micromamba install -y libffi"<=3.4" --allow-downgrade
⚠ Shard Index for nodefaults/linux-64 not available, falling back to flat repodata
Using Flat Repodata for nodefaults/linux-64                                               ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/noarch not available, falling back to flat repodata
Using Flat Repodata for nodefaults/noarch                                                 ✔ Done (0.0 sec)
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)
Parsing Packages' Records                                                                 ✔ Done (0.3 sec)

Pinned packages:

  - python=3.13

Resolving Environment                                                                     ✔ Done (0.3 sec)

Transaction

  Prefix: /home/user/micromamba/envs/d52py313

  Updating specs:

   - libffi<=3.4


  Package         Version  Build               Channel           Size
───────────────────────────────────────────────────────────────────────
  Install:
───────────────────────────────────────────────────────────────────────

  + libstdcxx-ng   15.2.0  hdf11a46_19         conda-forge       28kB

  Remove:
───────────────────────────────────────────────────────────────────────

  - pip            26.1.2  pyh145f28c_0        conda-forge     Cached
  - python        3.13.11  hcf712cf_100_cp313  anaconda        Cached

  Change:
───────────────────────────────────────────────────────────────────────

  - libgcc         15.2.0  h69a1729_8          anaconda        Cached
  + libgcc         15.2.0  he0feb66_19         conda-forge        1MB
  - libgcc-ng      15.2.0  h166f726_8          anaconda        Cached
  + libgcc-ng      15.2.0  h69a702a_19         conda-forge       28kB
  - libstdcxx      15.2.0  h39759b7_8          anaconda        Cached
  + libstdcxx      15.2.0  h934c35e_19         conda-forge        6MB

  Downgrade:
───────────────────────────────────────────────────────────────────────

  - libffi          3.5.2  h3435931_0          conda-forge     Cached
  + libffi            3.3  h58526e2_2          conda-forge       53kB

  Summary:

  Install: 1 packages
  Remove: 2 packages
  Change: 3 packages
  Downgrade: 1 packages

  Total download: 7MB

───────────────────────────────────────────────────────────────────────



Transaction starting
libstdcxx-ng                                        27.8kB @ 120.3kB/s  0.1s
libgcc-ng                                           27.7kB @  ??.?MB/s  0.1s
libffi                                              52.6kB @  ??.?MB/s  0.1s
libgcc                                               1.0MB @   2.9MB/s  0.3s
libstdcxx                                            5.9MB @   6.4MB/s  0.8s
Unlinking libgcc-15.2.0-h69a1729_8
Unlinking python-3.13.11-hcf712cf_100_cp313
Unlinking libstdcxx-15.2.0-h39759b7_8
Unlinking libgcc-ng-15.2.0-h166f726_8
Unlinking libffi-3.5.2-h3435931_0
Linking libgcc-15.2.0-he0feb66_19
Linking libstdcxx-15.2.0-h934c35e_19
Linking libgcc-ng-15.2.0-h69a702a_19
Linking libstdcxx-ng-15.2.0-hdf11a46_19
Linking libffi-3.3-h58526e2_2

Transaction finished

(d52py313) user@f340759bba63:~$

Why Python and Pip gets removed ? ... mhm ....

[ifrh]

related:

• micromamba proposes to remove a conflicting package instead of giving unsolvable error #2166
• unknown command "inspect" with pip < 22.2 #4075
• PackageInfo comparability #4176

[ifrh]

Oh here are the outputs of micromamba info

       libmamba version : 2.6.2
     micromamba version : 2.6.2
           curl version : libcurl/8.19.0 OpenSSL/3.5.6 zlib/1.3.1 zstd/1.5.7 libssh2/1.11.1 nghttp2/1.68.1 mit-krb5/1.22.2
     libarchive version : libarchive 3.8.6 zlib/1.3.1 bz2lib/1.0.8 libzstd/1.5.7 libb2/bundled
       envs directories : /home/user/micromamba/envs
          package cache : /home/user/micromamba/pkgs
                          /home/user/.mamba/pkgs
            environment : d52py313 (active)
           env location : /home/user/micromamba/envs/d52py313
      user config files : /home/user/.mambarc
 populated config files : /home/user/.condarc
       virtual packages : __unix=0=0
                          __linux=6.6.114=0
                          __glibc=2.31=0
                          __archspec=1=x86_64_v4
               channels : https://conda.anaconda.org/conda-forge/linux-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://conda.anaconda.org/nodefaults/linux-64
                          https://conda.anaconda.org/nodefaults/noarch
       base environment : /home/user/micromamba
               platform : linux-64

--

Side note:
If anyone has any ideas on how I can solve the problem with the Micromamba environment -
which caused the command python -c “import ldap” to reference a library outside the environment
(which really shouldn't happen) and then crash due to ffi-incompatibilities (ImportError: /usr/lib/x86_64-linux-gnu/libp11-kit.so.0: undefined symbol: ffi_type_pointer, version LIBFFI_BASE_7.0) - I'd appreciate any suggestions...

[jjerphan]

Can you retry without using --allow-downgrade?

[ifrh]

(base) user@b39ccacb96a0:~$ micromamba --version
2.7.0

(base) user@b39ccacb96a0:~$ micromamba info

       libmamba version : 2.7.0
     micromamba version : 2.7.0
           curl version : libcurl/8.20.0 OpenSSL/3.5.6 zlib/1.3.2 zstd/1.5.7 libssh2/1.11.1 nghttp2/1.68.1 mit-krb5/1.22.2
     libarchive version : libarchive 3.8.7 zlib/1.3.2 bz2lib/1.0.8 libzstd/1.5.7 libb2/bundled
       envs directories : /home/user/micromamba/envs
          package cache : /home/user/micromamba/pkgs
                          /home/user/.mamba/pkgs
            environment : base (active)
           env location : /home/user/micromamba
      user config files : /home/user/.mambarc
 populated config files : /home/user/.condarc
       virtual packages : __unix=0=0
                          __linux=6.6.114=0
                          __glibc=2.31=0
                          __archspec=1=x86_64_v4
               channels : https://conda.anaconda.org/conda-forge/linux-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://conda.anaconda.org/nodefaults/linux-64
                          https://conda.anaconda.org/nodefaults/noarch
       base environment : /home/user/micromamba
               platform : linux-64

(base) user@b39ccacb96a0:~$ micromamba activate d52py313
(d52py313) user@b39ccacb96a0:~$ which python
/home/user/micromamba/envs/d52py313/bin/python

(d52py313) user@b39ccacb96a0:~$ python --version
Python 3.13.11

(d52py313) user@b39ccacb96a0:~$ pip --version
pip 26.1.2 from /home/user/micromamba/envs/d52py313/lib/python3.13/site-packages/pip (python 3.13)

(d52py313) user@b39ccacb96a0:~$ micromamba list env
List of packages in environment: "/home/user/micromamba/envs/d52py313"

(d52py313) user@b39ccacb96a0:~$ pip freeze
asgiref==3.11.1
cffi==2.0.0
chardet==7.4.3
cycler==0.12.1
Django==5.2
django-debug-toolbar==6.3.0
django-extensions==4.1
django-tinymce==3.7.1
docutils==0.23
kiwisolver==1.5.0
Markdown==3.10.2
matplotlib==3.10.9
mod_wsgi==6.0.1
numpy==2.4.6
packaging==26.2
pandas==3.0.3
pillow==12.2.0
psutil==7.2.2
psycopg2-binary==2.9.12
pyasn1==0.6.3
pyasn1_modules==0.4.2
pycparser==3.0
Pygments==2.7.4
pyparsing==3.3.2
python-dateutil==2.9.0.post0
python-ldap==3.4.7
pytz==2026.2
setuptools==82.0.1
six==1.17.0
sqlparse==0.5.5
typing_extensions==4.15.0
urllib3==2.7.0
wheel==0.47.0

And now here is the test without "--allow-downgrade"

(d52py313) user@b39ccacb96a0:~$ micromamba install -y libffi"<=3.4"
⚠ Shard Index for nodefaults/linux-64 not available, falling back to flat repodata
Using Flat Repodata for nodefaults/linux-64                                               ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/noarch not available, falling back to flat repodata
Using Flat Repodata for nodefaults/noarch                                                 ✔ Done (0.0 sec)
Fetch Shard Index for conda-forge/linux-64                                                ✔ Done (0.3 sec)
Fetch Shard Index for conda-forge/noarch                                                  ✔ Done (0.4 sec)
Fetching and Parsing Packages' Shards                                                     ✔ Done (3.7 sec)
Parsing Packages' Records                                                                 ✔ Done (4.5 sec)

Pinned packages:

  - python=3.13

Resolving Environment                                                                     ✔ Done (0.1 sec)

Transaction

  Prefix: /home/user/micromamba/envs/d52py313

  Updating specs:

   - libffi<=3.4


  Package         Version  Build               Channel           Size
───────────────────────────────────────────────────────────────────────
  Install:
───────────────────────────────────────────────────────────────────────

  + libstdcxx-ng   15.2.0  hdf11a46_19         conda-forge       28kB

  Remove:
───────────────────────────────────────────────────────────────────────

  - cffi            2.0.0  py313h4eded50_1     anaconda        Cached
  - pip            26.1.2  pyh145f28c_0        conda-forge     Cached
  - pycparser         3.0  py313h06a4308_0     anaconda        Cached
  - python        3.13.11  hcf712cf_100_cp313  anaconda        Cached

  Change:
───────────────────────────────────────────────────────────────────────

  - libgcc         15.2.0  h69a1729_8          anaconda        Cached
  + libgcc         15.2.0  he0feb66_19         conda-forge        1MB
  - libgcc-ng      15.2.0  h166f726_8          anaconda        Cached
  + libgcc-ng      15.2.0  h69a702a_19         conda-forge       28kB
  - libstdcxx      15.2.0  h39759b7_8          anaconda        Cached
  + libstdcxx      15.2.0  h934c35e_19         conda-forge        6MB

  Downgrade:
───────────────────────────────────────────────────────────────────────

  - libffi          3.4.8  hc5d346e_2          anaconda        Cached
  + libffi            3.3  h58526e2_2          conda-forge       53kB
  - p11-kit        0.26.1  hc918ef4_0          anaconda        Cached
  + p11-kit       0.23.21  hb875675_1          conda-forge     Cached

  Summary:

  Install: 1 packages
  Remove: 4 packages
  Change: 3 packages
  Downgrade: 2 packages

  Total download: 7MB

───────────────────────────────────────────────────────────────────────



Transaction starting
libgcc-ng                                           27.7kB @  58.6kB/s  0.1s
libffi                                              52.6kB @  68.2kB/s  0.1s
libstdcxx-ng                                        27.8kB @  ??.?MB/s  0.1s
libgcc                                               1.0MB @   2.0MB/s  0.4s
libstdcxx                                            5.9MB @   4.4MB/s  0.8s
Unlinking libgcc-15.2.0-h69a1729_8
Unlinking libstdcxx-15.2.0-h39759b7_8
Unlinking libgcc-ng-15.2.0-h166f726_8
Unlinking python-3.13.11-hcf712cf_100_cp313
Unlinking libffi-3.4.8-hc5d346e_2
Unlinking p11-kit-0.26.1-hc918ef4_0
Linking libgcc-15.2.0-he0feb66_19
Linking libstdcxx-15.2.0-h934c35e_19
Linking libgcc-ng-15.2.0-h69a702a_19
Linking libstdcxx-ng-15.2.0-hdf11a46_19
Linking libffi-3.3-h58526e2_2
Linking p11-kit-0.23.21-hb875675_1

Transaction finished

(d52py313) user@b39ccacb96a0:~$ python --version
bash: python: command not found

[jjerphan]

Recent version of python (3.13) use a newer libffi (3.4.2 at minimum), you can use:

micromamba install python "libffi<=3.4"

To keep python and pip for now.

We'll inspect the issue to see whether we can keep python and pip installed as much as possible.

[ifrh]

Next test: Here pip gets updated via micromamba, but to a newer Python version than Python is pinned inside the environment to.
( I assume this is a problem of reading package meta information?)

(base) user@b39ccacb96a0:~$  micromamba create -y -n "old_python34" python="3.4" "pip<=19.0" -c anaconda -c conda-forge --channel-priority flexible
⚠ Shard Index for anaconda/linux-64 not available, falling back to flat repodata
Using Flat Repodata for anaconda/linux-64                                                 ✔ Done (0.5 sec)
⚠ Shard Index for anaconda/noarch not available, falling back to flat repodata
Using Flat Repodata for anaconda/noarch                                                   ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/linux-64 not available, falling back to flat repodata
Using Flat Repodata for nodefaults/linux-64                                               ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/noarch not available, falling back to flat repodata
Using Flat Repodata for nodefaults/noarch                                                 ✔ Done (0.0 sec)
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.6 sec)
Parsing Packages' Records                                                                 ✔ Done (1.5 sec)

Resolving Environment                                                                     ✔ Done (0.3 sec)

Transaction

  Prefix: /home/user/micromamba/envs/old_python34

  Updating specs:

   - python=3.4
   - pip<=19.0


  Package              Version  Build         Channel           Size
──────────────────────────────────────────────────────────────────────
  Install:
──────────────────────────────────────────────────────────────────────

  + _openmp_mutex          5.1  52_gnu        anaconda        Cached
  + ca-certificates  2026.5.14  h06a4308_0    anaconda        Cached
  + certifi          2020.6.20  pyhd3eb1b0_3  anaconda        Cached
  + libgcc              15.2.0  h69a1729_8    anaconda        Cached
  + libgcc-ng           15.2.0  h166f726_8    anaconda        Cached
  + ncurses                5.9  10            conda-forge     Cached
  + openssl             1.0.2u  h7b6447c_0    anaconda        Cached
  + pip                  9.0.1  py34_0        conda-forge     Cached
  + python               3.4.5  2             conda-forge     Cached
  + readline               6.2  0             conda-forge     Cached
  + setuptools          32.3.1  py34_0        conda-forge     Cached
  + sqlite              3.13.0  1             conda-forge     Cached
  + tk                  8.5.19  2             conda-forge     Cached
  + wheel               0.37.1  pyhd3eb1b0_0  anaconda        Cached
  + xz                  5.2.10  h5eee18b_1    anaconda        Cached
  + zlib                1.2.13  hd233ad5_2    anaconda        Cached

  Summary:

  Install: 16 packages

  Total download: 0 B

──────────────────────────────────────────────────────────────────────



Transaction starting
Linking tk-8.5.19-2
Linking ncurses-5.9-10
Linking sqlite-3.13.0-1
Linking readline-6.2-0
Linking ca-certificates-2026.5.14-h06a4308_0
Linking _openmp_mutex-5.1-52_gnu
Linking libgcc-15.2.0-h69a1729_8
Linking libgcc-ng-15.2.0-h166f726_8
Linking zlib-1.2.13-hd233ad5_2
Linking xz-5.2.10-h5eee18b_1
Linking openssl-1.0.2u-h7b6447c_0
Linking python-3.4.5-2
Linking pip-9.0.1-py34_0
Linking certifi-2020.6.20-pyhd3eb1b0_3
Linking setuptools-32.3.1-py34_0
Linking wheel-0.37.1-pyhd3eb1b0_0

Transaction finished


To activate this environment, use:

    micromamba activate old_python34

Or to execute a single command in this environment, use:

    micromamba run -n old_python34 mycommand

(base) user@b39ccacb96a0:~$ micromamba activate old_python34
(old_python34) user@b39ccacb96a0:~$ pip --version
pip 9.0.1 from /home/user/micromamba/envs/old_python34/lib/python3.4/site-packages (python 3.4)
(old_python34) user@b39ccacb96a0:~$ which python
/home/user/micromamba/envs/old_python34/bin/python
(old_python34) user@b39ccacb96a0:~$ python --version
Python 3.4.5

(old_python34) user@b39ccacb96a0:~$ micromamba list env
ERROR: unknown command "inspect"
List of packages in environment: "/home/user/micromamba/envs/old_python34"

(old_python34) user@b39ccacb96a0:~$ pip freeze
certifi==2020.6.20
You are using pip version 9.0.1, however version 26.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

(old_python34) user@b39ccacb96a0:~$ micromamba update -y pip wheel setuptools
ERROR: unknown command "inspect"
⚠ Shard Index for nodefaults/linux-64 not available, falling back to flat repodata
Using Flat Repodata for nodefaults/linux-64                                               ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/noarch not available, falling back to flat repodata
Using Flat Repodata for nodefaults/noarch                                                 ✔ Done (0.0 sec)
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)
Parsing Packages' Records                                                                 ✔ Done (0.2 sec)
ERROR: unknown command "inspect"

Pinned packages:

  - python=3.4

Resolving Environment                                                                     ✔ Done (0.1 sec)

Transaction

  Prefix: /home/user/micromamba/envs/old_python34

  Updating specs:

   - pip
   - wheel
   - setuptools
  Removing specs:

   - pip
   - wheel
   - setuptools


  Package  Version  Build         Channel           Size
──────────────────────────────────────────────────────────
  Upgrade:
──────────────────────────────────────────────────────────

  - pip      9.0.1  py34_0        conda-forge     Cached
  + pip     20.3.4  pyhd8ed1ab_0  conda-forge     Cached

  Summary:

  Upgrade: 1 packages

  Total download: 0 B

──────────────────────────────────────────────────────────



Transaction starting
Unlinking pip-9.0.1-py34_0
Linking pip-20.3.4-pyhd8ed1ab_0

Transaction finished

(old_python34) user@b39ccacb96a0:~$ pip --version
Traceback (most recent call last):
  File "/home/user/micromamba/envs/old_python34/bin/pip", line 6, in <module>
    from pip._internal.cli.main import main
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/cli/main.py", line 10, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/cli/autocompletion.py", line 9, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/cli/main_parser.py", line 7, in <module>
    from pip._internal.cli import cmdoptions
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/cli/cmdoptions.py", line 25, in <module>
    from pip._internal.cli.progress_bars import BAR_TYPES
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/cli/progress_bars.py", line 12, in <module>
    from pip._internal.utils.logging import get_indentation
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/utils/logging.py", line 18, in <module>
    from pip._internal.utils.misc import ensure_dir
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_internal/utils/misc.py", line 21, in <module>
    from pip._vendor import pkg_resources
  File "/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 92, in <module>
    raise RuntimeError("Python 3.5 or later is required")
RuntimeError: Python 3.5 or later is required

Just to mention: pip itself would have been able to update to a suitable version, if micromamba had not updated first.

(old_python34) praktomat@b39ccacb96a0:~$ pip install --upgrade --force-reinstall --compile pip setuptools wheel
Collecting pip
  Downloading https://files.pythonhosted.org/packages/5c/e0/be401c003291b56efc55aeba6a80ab790d3d4cece2778288d65323009420/pip-19.1.1-py2.py3-none-any.whl (1.4MB)
    100% |████████████████████████████████| 1.4MB 1.4MB/s
Collecting setuptools
  Downloading https://files.pythonhosted.org/packages/91/af/18d58ed8a8e7e6b91d71b0367034faf8ea41e1004018811388ed07a7f2d6/setuptools-43.0.0-py2.py3-none-any.whl (583kB)
    100% |████████████████████████████████| 583kB 2.1MB/s
Collecting wheel
  Downloading https://files.pythonhosted.org/packages/00/83/b4a77d044e78ad1a45610eb88f745be2fd2c6d658f9798a15e384b7d57c9/wheel-0.33.6-py2.py3-none-any.whl
Installing collected packages: pip, setuptools, wheel
  Found existing installation: pip 9.0.1
    Uninstalling pip-9.0.1:
      Successfully uninstalled pip-9.0.1
  Found existing installation: setuptools 32.3.1.post20170108
    Uninstalling setuptools-32.3.1.post20170108:
      Successfully uninstalled setuptools-32.3.1.post20170108
  Found existing installation: wheel 0.37.1
    Uninstalling wheel-0.37.1:
      Successfully uninstalled wheel-0.37.1
Successfully installed pip-19.1.1 setuptools-43.0.0 wheel-0.33.6
You are using pip version 19.1.1, however version 26.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

(old_python34) user@b39ccacb96a0:~$ pip --version
pip 19.1.1 from /home/user/micromamba/envs/old_python34/lib/python3.4/site-packages/pip (python 3.4)

(old_python34) user@b39ccacb96a0:~$ micromamba install -y libffi"=3.3" p11-kit -c anaconda -c conda-forge --channel-priority fle
xible
ERROR: unknown command "inspect"
⚠ Shard Index for anaconda/linux-64 not available, falling back to flat repodata
Using Flat Repodata for anaconda/linux-64                                                 ✔ Done (0.2 sec)
⚠ Shard Index for anaconda/noarch not available, falling back to flat repodata
Using Flat Repodata for anaconda/noarch                                                   ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/linux-64 not available, falling back to flat repodata
Using Flat Repodata for nodefaults/linux-64                                               ✔ Done (0.0 sec)
⚠ Shard Index for nodefaults/noarch not available, falling back to flat repodata
Using Flat Repodata for nodefaults/noarch                                                 ✔ Done (0.0 sec)
Using Cached Shard Index for conda-forge/linux-64                                                   ✔ Done
Using Cached Shard Index for conda-forge/noarch                                                     ✔ Done
Fetching and Parsing Packages' Shards                                                     ✔ Done (0.1 sec)
Parsing Packages' Records                                                                 ✔ Done (0.7 sec)
ERROR: unknown command "inspect"

Pinned packages:

  - python=3.4

Resolving Environment                                                                     ✔ Done (0.2 sec)

Transaction

  Prefix: /home/user/micromamba/envs/old_python34

  Updating specs:

   - libffi=3.3
   - p11-kit


  Package         Version  Build       Channel           Size
───────────────────────────────────────────────────────────────
  Install:
───────────────────────────────────────────────────────────────

  + libffi            3.3  he6710b0_2  anaconda        Cached
  + libstdcxx      15.2.0  h39759b7_8  anaconda        Cached
  + libstdcxx-ng   15.2.0  hc03a8fd_8  anaconda        Cached
  + libtasn1       4.21.0  h27ab2c4_0  anaconda        Cached
  + p11-kit       0.23.21  hb875675_1  conda-forge     Cached

  Summary:

  Install: 5 packages

  Total download: 0 B

───────────────────────────────────────────────────────────────



Transaction starting
Linking libtasn1-4.21.0-h27ab2c4_0
Linking libstdcxx-15.2.0-h39759b7_8
Linking libstdcxx-ng-15.2.0-hc03a8fd_8
Linking libffi-3.3-he6710b0_2
Linking p11-kit-0.23.21-hb875675_1

Transaction finished

(old_python34) user@b39ccacb96a0:~$ pip install -U --no-cache-dir --force-reinstall --compile --no-binary :cffi: cffi pyOpenSSL
DEPRECATION: Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it. Please upgrade your Python as Python 3.4 won't be maintained after March 2019 (cf PEP 429).
Collecting cffi
  Downloading https://files.pythonhosted.org/packages/2b/a8/050ab4f0c3d4c1b8aaa805f70e26e84d0e27004907c5b8ecc1d31815f92a/cffi-1.15.1.tar.gz (508kB)
     |████████████████████████████████| 512kB 1.8MB/s
Collecting pyOpenSSL
  Downloading https://files.pythonhosted.org/packages/9e/de/f8342b68fa9e981d348039954657bdf681b2ab93de27443be51865ffa310/pyOpenSSL-19.1.0-py2.py3-none-any.whl (53kB)
     |████████████████████████████████| 61kB 13.5MB/s
Collecting pycparser (from cffi)
  Downloading https://files.pythonhosted.org/packages/62/d5/5f610ebe421e85889f2e55e33b7f9a6795bd982198517d912eb1c76e1a53/pycparser-2.21-py2.py3-none-any.whl (118kB)
     |████████████████████████████████| 122kB 9.0MB/s
Collecting cryptography>=2.8 (from pyOpenSSL)
  Downloading https://files.pythonhosted.org/packages/ca/9a/7cece52c46546e214e10811b36b2da52ce1ea7fa203203a629b8dfadad53/cryptography-2.8-cp34-abi3-manylinux2010_x86_64.whl (2.3MB)
     |████████████████████████████████| 2.3MB 11.5MB/s
Collecting six>=1.5.2 (from pyOpenSSL)
  Downloading https://files.pythonhosted.org/packages/b7/ce/149a00dd41f10bc29e5921b496af8b574d8413afcd5e30dfa0ed46c2cc5e/six-1.17.0-py2.py3-none-any.whl
Building wheels for collected packages: cffi
  Building wheel for cffi (setup.py) ... done
  Stored in directory: /tmp/pip-ephem-wheel-cache-hku_qktx/wheels/2a/63/34/2d00df575488c28abba6b0abd4013fa1fe54499814e7f7a6f1
Successfully built cffi
Installing collected packages: pycparser, cffi, six, cryptography, pyOpenSSL
Successfully installed cffi-1.15.1 cryptography-2.8 pyOpenSSL-19.1.0 pycparser-2.21 six-1.17.0

(old_python34) user@b39ccacb96a0:~$ python -m OpenSSL.debug
pyOpenSSL: 19.1.0
cryptography: 2.8
cffi: 1.15.1
cryptography's compiled against OpenSSL: OpenSSL 1.1.1d  10 Sep 2019
cryptography's linked OpenSSL: OpenSSL 1.1.1d  10 Sep 2019
Pythons's OpenSSL: OpenSSL 1.0.2u  20 Dec 2019
Python executable: /home/user/micromamba/envs/old_python34/bin/python
Python version: 3.4.5 | packaged by conda-forge | (default, Sep  8 2016, 14:22:44)
[GCC 4.8.2 20140120 (Red Hat 4.8.2-15)]
Platform: linux
sys.path: ['', '/home/user/micromamba/envs/old_python34/lib/python34.zip', '/home/user/micromamba/envs/old_python34/lib/python3.4', '/home/user/micromamba/envs/old_python34/lib/python3.4/plat-linux', '/home/user/micromamba/envs/old_python34/lib/python3.4/lib-dynload', '/home/user/micromamba/envs/old_python34/lib/python3.4/site-packages']
(old_python34) user@b39ccacb96a0:~$

[jjerphan]

Yes, you need to manually update python to a newer version. pip and python versions might be decoupled on conda-forge.

[ifrh]

I just notice, that micromamba list env and micromamba list gives different output for same environment.
(Both ignore which packages hat been updated or installed using pip directly.)

(old_python34) user@b39ccacb96a0:~$ micromamba list env
ERROR: unknown command "inspect"
List of packages in environment: "/home/user/micromamba/envs/old_python34"

(old_python34) user@b39ccacb96a0:~$ micromamba list
ERROR: unknown command "inspect"
List of packages in environment: "/home/user/micromamba/envs/old_python34"

  Name             Version    Build         Channel
─────────────────────────────────────────────────────────
  _openmp_mutex    5.1        52_gnu        anaconda
  ca-certificates  2026.5.14  h06a4308_0    anaconda
  certifi          2020.6.20  pyhd3eb1b0_3  anaconda
  libffi           3.3        he6710b0_2    anaconda
  libgcc           15.2.0     h69a1729_8    anaconda
  libgcc-ng        15.2.0     h166f726_8    anaconda
  libstdcxx        15.2.0     h39759b7_8    anaconda
  libstdcxx-ng     15.2.0     hc03a8fd_8    anaconda
  libtasn1         4.21.0     h27ab2c4_0    anaconda
  ncurses          5.9        10            conda-forge
  openssl          1.0.2u     h7b6447c_0    anaconda
  p11-kit          0.23.21    hb875675_1    conda-forge
  pip              9.0.1      py34_0        conda-forge
  python           3.4.5      2             conda-forge
  readline         6.2        0             conda-forge
  setuptools       32.3.1     py34_0        conda-forge
  sqlite           3.13.0     1             conda-forge
  tk               8.5.19     2             conda-forge
  wheel            0.37.1     pyhd3eb1b0_0  anaconda
  xz               5.2.10     h5eee18b_1    anaconda
  zlib             1.2.13     hd233ad5_2    anaconda

[ifrh]

@jjerphan wrote:

Yes, you need to manually update python to a newer version. pip and python versions might be decoupled on conda-forge.

Thanks for that pointer...
In consequence there could also other packages might be decoupled.

So runtime exceptions like the following can only be "fixed",
if the "environment user" knows which package needs which other?

[some micromamba environment] 
     site-packages/pip/_internal/download.py", line 439, in request
     return super(PipSession, self).request(method, url, *args, **kwargs)
     [...]
     site-packages/OpenSSL/SSL.py", line 338, in __init__
    "int (*)(int, X509_STORE_CTX *)", wrapper)
SystemError: ffi_prep_closure(): bad user_data (it seems that the version of the libffi library seen at runtime is different from the 'ffi.h' file seen at compile-time)

(my spontanous idea was : please micromamba give me the source package, and all things to do a new compilation ... )