PR → release-17.09 (not master)

This PR targets branch release-17.09, not branch master. The changes proposed here are also based on release-17.09 and (other than advised in the README) have not been rebased onto master.

Rebasing these changes onto master would lose a part of them, as the disabled = isPy3k; line being removed here isn't even present on master. (It was introduced with 4b5cc4e that as of today isn't an ancestor of master.)

Motivation for this change

Progress on: #28643

4b5cc4e808b1#diff-2afbba83e1b14f9e0c304c769831a0e2R3411 disabled tablib for Python 3, probably because the build was failing with

ValueError: cannot use LOCALE flag with a str pattern

at https://github.com/kennethreitz/tablib/blob/v0.10.0/tablib/packages/xlwt3/ExcelFormulaLexer.py#L52

tablib v0.10.0 seems to be back from 2014 and the failing code itself from 2011. The issue at hand has been fixed in kennethreitz/tablib#263 in 2016 for tablib v0.11.4 and later, incl. the current v0.12.1. Time for us to update, too, I guess.

New dependencies

tablib v0.12.1 needs some additional build- and runtime dependencies that are also being added to the derivation with this change:

• xlwt, openpyxl, pyyaml, xlrd, odfpy, unicodecsv and pandas are needed for the build to succeed.
• xlwt, openpyxl, pyyaml, xlrd and odfpy are needed for import tablib to succeed in a Python 3.6 environment with the resulting tablib installed.

The latter have therefore be added as propagatedBuildInputs, while unicodecsv and pandas have been added to buildInputs.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.