Failing to install Orange via Pip

[KimHono]

Hi ! I tried to install Orange via the Pip method explained here : https://github.com/biolab/orange3 While proceeding with pip install orange3 I saw these errors: ERROR: Command errored out with exit status 1: command: ~/orange3venv/bin/python ~/orange3venv/lib/python3.9/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmp753675oj cwd: /tmp/pip-install-u9ojt7yc/orange3 and also setup.py:155: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses import imp and also Orange/classification/_simple_tree.c: In function ‘gain_ratio_c’: Orange/classification/_simple_tree.c:63:2: warning: implicit declaration of function ‘qsort_r’; did you mean ‘qsort’? [-Wimplicit-function-declaration] 63 | qsort_r(base, nel, size, compar, thunk) Orange/classification/_simple_tree.c:147:2: note: in expansion of macro ‘QSORT_R_FUNC’ 147 | QSORT_R_FUNC(examples, size, sizeof(struct Example), (void*) &compar_attr, compar_examples); and also Orange/classification/_tree_scorers.c: In function ‘__pyx_pf_6Orange_14classification_13_tree_scorers_2find_threshold_entropy’: Orange/classification/_tree_scorers.c:3115:27: warning: comparison of integer expressions of different signedness: ‘unsigned int’ and ‘int’ [-Wsign-compare] 3115 | __pyx_t_7 = ((__pyx_v_N <= __pyx_v_min_leaf) != 0); and also Orange/classification/_tree_scorers.c: In function ‘__Pyx_modinit_type_init_code’: Orange/classification/_tree_scorers.c:24988:25: error: ‘PyTypeObject’ {aka ‘struct _typeobject’} has no member named ‘tp_print’ 24988 | __pyx_type___pyx_array.tp_print = 0; and also Orange/classification/_tree_scorers.c: In function ‘__Pyx_ParseOptionalKeywords’: Orange/classification/_tree_scorers.c:25695:21: warning: ‘_PyUnicode_get_wstr_length’ is deprecated [-Wdeprecated-declarations] 25695 | (PyUnicode_GET_SIZE(**name) != PyUnicode_GET_SIZE(key)) ? 1 : And many more, then finally: ERROR: Could not build wheels for orange3 which use PEP 517 and cannot be installed directly As I imagined, the result doesn't work: ~/orange3venv/bin/python: Error while finding module specification for 'Orange.canvas' (ModuleNotFoundError: No module named 'Orange')

My system : 5.9.11-arch2-1 Python version 3.9.0 Pip version 20.3.1

[markotoplak]

The what you posted are just warnings and I therefore had no idea what went wrong. Post the complete log, please, or at least the actual error with some neighboring context, please.

[KimHono]

To understand what's going on, I created a totally new virtual machine, and successfully installed Orange via pip. But this time, Python's version is 3.8.6 and Linux is 5.9.11-3-MANJARO.

Linux is quite the same in both cases. So, maybe the problem is only linked with the Python environment ?

[KimHono]

I post here the complete log. Orange_log.txt

System : 5.9.11-arch2-1 Python version 3.9.0

[markotoplak]

Thanks. This was fixed in #5080, but that was not released yet. Either use the master branch or use Orange with python<=3.8.