diff options
| -rw-r--r-- | Doc/library/warnings.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/library/warnings.rst b/Doc/library/warnings.rst index e4343e8..91ab085 100644 --- a/Doc/library/warnings.rst +++ b/Doc/library/warnings.rst @@ -383,6 +383,14 @@ Available Context Managers .. note:: + The :class:`catch_warnings` manager works by replacing and + then later restoring the module's + :func:`showwarning` function and internal list of filter + specifications. This means the context manager is modifying + global state and therefore is not thread-safe. + + .. note:: + In Python 3.0, the arguments to the constructor for :class:`catch_warnings` are keyword-only arguments. |