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| author | Dominik1123 <15989985+Dominik1123@users.noreply.github.com> | 2020-11-16 01:30:55 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-11-16 01:30:55 (GMT) |
| commit | c3b9592244a9112d8af9610ff1c4e1e4cd4bfaca (patch) | |
| tree | bb828d566663902449defdf65c90624b5992e67f | |
| parent | a26215db11cfcf7b5f55cab9e91396761a0e0bcf (diff) | |
| download | cpython-c3b9592244a9112d8af9610ff1c4e1e4cd4bfaca.zip cpython-c3b9592244a9112d8af9610ff1c4e1e4cd4bfaca.tar.gz cpython-c3b9592244a9112d8af9610ff1c4e1e4cd4bfaca.tar.bz2 | |
bpo-42317: Improve docs of typing.get_args concerning Union (GH-23254)
| -rw-r--r-- | Doc/library/typing.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst index 9a993c0..a8de984 100644 --- a/Doc/library/typing.rst +++ b/Doc/library/typing.rst @@ -1706,6 +1706,9 @@ Introspection helpers For a typing object of the form ``X[Y, Z, ...]`` these functions return ``X`` and ``(Y, Z, ...)``. If ``X`` is a generic alias for a builtin or :mod:`collections` class, it gets normalized to the original class. + If ``X`` is a :class:`Union` contained in another generic type, + the order of ``(Y, Z, ...)`` may be different from the order of + the original arguments ``[Y, Z, ...]`` due to type caching. For unsupported objects return ``None`` and ``()`` correspondingly. Examples:: |