Update tox requirement from ==4.61.* to ==4.64.* in the python-requirements group

[dependabot]

Updates the requirements on tox to permit the latest version.
Updates tox to 4.64.4

Release notes

Sourced from tox's releases.

v4.64.4

What's Changed

• fix(pip): pass --pre once in the default command by @​Rodrigo-Palma in tox-dev/tox#4097
• fix(cli): parse list-valued defaults by nargs by @​januththedev in tox-dev/tox#4098

New Contributors

• @​januththedev made their first contribution in tox-dev/tox#4098

Full Changelog: tox-dev/tox@4.64.3...4.64.4

Changelog

Sourced from tox's changelog.

Bug fixes - 4.64.4

• Pass --pre once, before the packages, in the default install_command with :ref:pip_pre set to true. (:issue:4097)
• Fix list conversion for command line defaults from environment variables and user configuration files. For example, TOX_LABELS=old;new selects environments labeled old or new, and TOX_LIST_KEYS_ONLY=env_name;deps selects both configuration keys. Support list-valued options without an explicit default or element type, including append actions. (:issue:4098)

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v4.64.3 (2026-09-26)

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Bug fixes - 4.64.3

• A set_env written as a list of tables in TOML now keeps every file entry and honors the order of the entries, so merging one environment's set_env into another no longer drops the environment file it referenced (:issue:4093) - by :user:Rodrigo-Palma.

  • Each { file = "..." } entry is read; previously only the last one survived, because the entries were merged into a single table first and a table cannot hold the key twice.
  • A variable set after a file entry wins over the value the file provides, matching the file| form in INI; previously a repeated variable was pulled back to its first position, letting the file override it.
  • A later entry that sets a variable without a marker clears the marker an earlier entry gave it, again matching the INI form. (:issue:4093)

• Create the package build environment change_dir directory before running the build commands, as the documentation already promises. (:issue:4095)

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v4.64.2 (2026-09-24)

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Bug fixes - 4.64.2

• A tox environment with env_dir = "{tox_root}/.venv" no longer crashes with FileExistsError after another environment ran (:issue:4090) - by :user:gaborbernat.

  • With :ref:venv_redirect unset, the new default, tox writes the redirect file unless a tox environment lives at .venv; with true, tox fails the run with an error naming that environment.
  • tox deletes a redirect file it wrote where an environment should live, and fails the environment with an error naming any other file there. (:issue:4091)

• The :PEP:832 .venv redirect file now names a deliberate development environment - by :user:gaborbernat.

  • tox picks :ref:venv_redirect_env, else an environment named dev, else the first that installs the project in development mode, and writes nothing without one, so a project that uses tox for tests alone gets no file.

... (truncated)

Commits

• efc4cc3 release 4.64.4
• 75ded6b fix(cli): parse list-valued defaults by nargs (#4098)
• f8bd565 fix(pip): pass --pre once in the default command (#4097)
• f46060e release 4.64.3
• ca35bdb Keep every file entry of a set_env list of tables (#4094)
• 31ed8d9 Create change_dir before running the external package build command (#4095)
• 9cd0f4e release 4.64.2
• c2b87d2 🐛 fix(run): point .venv at a deliberate dev env (#4092)
• a8fa8cc 🐛 fix(run): keep .venv redirect off for a .venv env (#4091)
• e40e8e6 release 4.64.1
• Additional commits viewable in compare view

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