I'm trying to downgrade libffi=3.3 because of a bug I'm encountering (see very end).
conda install libffi==3.3 -n mismatch
Channels:
- defaults
Platform: linux-64
Collecting package metadata (repodata.json): done
Solving environment: \ warning libmamba Added empty dependency for problem type SOLVER_RULE_UPDATE
failed
LibMambaUnsatisfiableError: Encountered problems while solving:
- package python-3.11.8-h955ad1f_0 requires libffi >=3.4,<3.5, but none of the providers can be installed
Could not solve for environment specs
The following packages are incompatible
├─ libffi 3.3 is requested and can be installed;
├─ matplotlib is installable with the potential options
│ ├─ matplotlib [3.6.2|3.7.1|3.7.2] would require
│ │ └─ matplotlib-base [>=3.6.2,<3.6.3.0a0 |>=3.7.1,<3.7.2.0a0 |>=3.7.2,<3.7.3.0a0 ] with the potential options
│ │ ├─ matplotlib-base [3.6.2|3.7.1|3.7.2] would require
│ │ │ └─ python >=3.11,<3.12.0a0 , which requires
│ │ │ └─ libffi >=3.4,<3.5 , which conflicts with any installable versions previously reported;
│ │ ├─ matplotlib-base [3.6.2|3.7.1|3.7.2] would require
│ │ │ └─ python >=3.10,<3.11.0a0 , which can be installed;
│ │ ├─ matplotlib-base [3.2.1|3.2.2|...|3.7.2] would require
│ │ │ └─ python >=3.8,<3.9.0a0 , which can be installed;
│ │ └─ matplotlib-base [3.3.2|3.6.2|3.7.1|3.7.2] would require
│ │ └─ python >=3.9,<3.10.0a0 , which can be installed;
│ ├─ matplotlib 3.8.0 would require
│ │ └─ python >=3.11,<3.12.0a0 , which cannot be installed (as previously explained);
│ ├─ matplotlib [2.0.2|2.1.0|...|2.2.3] would require
│ │ └─ python >=2.7,<2.8.0a0 , which can be installed;
│ ├─ matplotlib [2.0.2|2.1.0|...|3.0.0] would require
│ │ └─ python >=3.5,<3.6.0a0 , which can be installed;
│ ├─ matplotlib [2.0.2|2.1.0|...|3.3.4] would require
│ │ └─ python >=3.6,<3.7.0a0 , which can be installed;
│ ├─ matplotlib [2.2.2|2.2.3|...|3.5.3] would require
│ │ └─ python >=3.7,<3.8.0a0 , which can be installed;
│ ├─ matplotlib [3.1.1|3.1.2|...|3.7.2] would require
│ │ └─ python >=3.8,<3.9.0a0 , which can be installed;
│ ├─ matplotlib [3.2.1|3.2.2|3.3.1] would require
│ │ └─ matplotlib-base [>=3.2.1,<3.2.2.0a0 |>=3.2.2,<3.2.3.0a0 |>=3.3.1,<3.3.2.0a0 ] with the potential options
│ │ ├─ matplotlib-base [3.2.1|3.2.2|...|3.7.2], which can be installed (as previously explained);
│ │ ├─ matplotlib-base [3.2.1|3.2.2|3.3.1|3.3.2] would require
│ │ │ └─ python >=3.6,<3.7.0a0 , which can be installed;
│ │ └─ matplotlib-base [3.2.1|3.2.2|3.3.1|3.3.2] would require
│ │ └─ python >=3.7,<3.8.0a0 , which can be installed;
│ ├─ matplotlib 3.3.2 would require
│ │ └─ matplotlib-base >=3.3.2,<3.3.3.0a0 , which can be installed (as previously explained);
│ ├─ matplotlib [3.3.4|3.4.2|...|3.8.0] would require
│ │ └─ python >=3.9,<3.10.0a0 , which can be installed;
│ ├─ matplotlib [3.5.0|3.5.1|...|3.8.0] would require
│ │ └─ python >=3.10,<3.11.0a0 , which can be installed;
│ └─ matplotlib 3.8.0 would require
│ └─ python >=3.12,<3.13.0a0 , which can be installed;
└─ pin-1 is not installable because it requires
└─ python 3.11.* , which conflicts with any installable versions previously reported.
(mismatch) :$ conda list python -n mismatch
# packages in environment at /home/x/anaconda3/envs/mismatch:
#
# Name Version Build Channel
python 3.11.8 h955ad1f_0
As you can see I already have downgraded python to 3.11 -- why is the conda solver complaining about "pin1" and its requirement for python 3.11?
The bug that I'm encountering is triggered by pystata, and is resolved after downgrading Python and libffi as suggested by the answer:
Traceback (most recent call last):
File "/usr/local/stata18/utilities/pystata/config.py", line 239, in init
stlib = cdll.LoadLibrary(lib_path)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "~/anaconda3/envs/mismatch/lib/python3.12/ctypes/__init__.py", line 460, in LoadLibrary
return self._dlltype(name)
^^^^^^^^^^^^^^^^^^^
File "~/anaconda3/envs/mismatch/lib/python3.12/ctypes/__init__.py", line 379, in __init__
self._handle = _dlopen(self._name, mode)
^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: /usr/lib/x86_64-linux-gnu/libp11-kit.so.0: undefined symbol: ffi_type_pointer, version LIBFFI_BASE_7.0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/snap/pycharm-professional/378/plugins/python/helpers/pydev/pydevd.py", line 1534, in _exec
pydev_imports.execfile(file, globals, locals) # execute the script
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/snap/pycharm-professional/378/plugins/python/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "main.py", line 17, in <module>
config.init('be')
File "/usr/local/stata18/utilities/pystata/config.py", line 241, in init
Conda does not allow Python versions to change without explicit declaration, which is the function of the pin. The conflict report shows that there is no version of python=3.11 that was built against libffi <3.4. Downgrading python further should do the trick, i.e.,
conda install -n mismatch python=3.10 libffi=3.3
Note that libffi=3.3 is over 3 years old, so it makes sense that Python 3.11 (released Oct. 2022) is not compatible.