Support for python 3.10

[samukweku]

• Any plans to support python 3.10? More of a discussion/conversation, than an issue

[oleksiyskononenko]

Sure, we need to. Have you tried to build dt with 3.10 and found any issues?

[samukweku]

Yes, I did try to build it and ran into issues:

  +==== ERRORS & WARNINGS ========
  |
  | src/core/python/obj.cc:71:59: error: too many initializers for ‘_Py_Identifier’
  |    71 | #define _Py_static_string_init(value) { NULL, value, NULL }
  |       |                                                           ^
  | /home/sam/miniforge3/envs/py310/include/python3.10/cpython/object.h:45:76: note: in expansion of macro ‘_Py_static_string_init’
  |    45 | #define _Py_static_string(varname, value)  static _Py_Identifier varname = _Py_static_string_init(value)
  |       |                                                                            ^~~~~~~~~~~~~~~~~~~~~~
  | src/core/python/obj.cc:71:59: error: too many initializers for ‘_Py_Identifier’
  |    71 | #define _Py_static_string_init(value) { NULL, value, NULL }
  |       |                                                           ^
  | /home/sam/miniforge3/envs/py310/include/python3.10/cpython/object.h:45:76: note: in expansion of macro ‘_Py_static_string_init’
  |    45 | #define _Py_static_string(varname, value)  static _Py_Identifier varname = _Py_static_string_init(value)
  |       |                                                                            ^~~~~~~~~~~~~~~~~~~~~~
  | src/core/python/obj.cc:71:59: error: too many initializers for ‘_Py_Identifier’
  |    71 | #define _Py_static_string_init(value) { NULL, value, NULL }
  |       |                                                           ^
  | /home/sam/miniforge3/envs/py310/include/python3.10/cpython/object.h:45:76: note: in expansion of macro ‘_Py_static_string_init’
  |    45 | #define _Py_static_string(varname, value)  static _Py_Identifier varname = _Py_static_string_init(value)
  |       |                                                                            ^~~~~~~~~~~~~~~~~~~~~~
  | src/core/python/obj.cc:71:59: error: too many initializers for ‘_Py_Identifier’
  |    71 | #define _Py_static_string_init(value) { NULL, value, NULL }
  |       |                                                           ^
  | /home/sam/miniforge3/envs/py310/include/python3.10/cpython/object.h:45:76: note: in expansion of macro ‘_Py_static_string_init’
  |    45 | #define _Py_static_string(varname, value)  static _Py_Identifier varname = _Py_static_string_init(value)
  |       |                                                                            ^~~~~~~~~~~~~~~~~~~~~~
  |
  +===============================
  Error compiling _datatable
  
  ----------------------------------------
WARNING: Discarding git+https://github.com/h2oai/datatable. Command errored out with exit status 1: /home/sam/miniforge3/envs/py310/bin/python3.10 /home/sam/miniforge3/envs/py310/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp_c54zo_2 Check the logs for full command output.
ERROR: Command errored out with exit status 1: /home/sam/miniforge3/envs/py310/bin/python3.10 /home/sam/miniforge3/envs/py310/lib/python3.10/site-packages/pip/_vendor/pep517/in_process/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp_c54zo_2 Check the logs for full command output.

[oleksiyskononenko]

You can try the latest main, It should now work with python 3.10.