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Diffstat (limited to 'Doc/library/sys.rst')
| -rw-r--r-- | Doc/library/sys.rst | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst index 93273c4..6264437 100644 --- a/Doc/library/sys.rst +++ b/Doc/library/sys.rst @@ -215,21 +215,6 @@ always available. a traceback object (see the Reference Manual) which encapsulates the call stack at the point where the exception originally occurred. - .. warning:: - - Assigning the *traceback* return value to a local variable in a function - that is handling an exception will cause a circular reference. Since most - functions don't need access to the traceback, the best solution is to use - something like ``exctype, value = sys.exc_info()[:2]`` to extract only the - exception type and value. If you do need the traceback, make sure to - delete it after use (best done with a :keyword:`try` - ... :keyword:`finally` statement) or to call :func:`exc_info` in a - function that does not itself handle an exception. - - Such cycles are normally automatically reclaimed when garbage collection - is enabled and they become unreachable, but it remains more efficient to - avoid creating cycles. - .. data:: exec_prefix |