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Diffstat (limited to 'Doc/using/cmdline.rst')
| -rw-r--r-- | Doc/using/cmdline.rst | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst index e0c80f6..185852a 100644 --- a/Doc/using/cmdline.rst +++ b/Doc/using/cmdline.rst @@ -358,9 +358,14 @@ Miscellaneous options .. cmdoption:: -X Reserved for various implementation-specific options. CPython currently - defines just one, you can use ``-X faulthandler`` to enable - :mod:`faulthandler`. It also allows to pass arbitrary values and retrieve - them through the :data:`sys._xoptions` dictionary. + defines two possible values: + + * ``-X faulthandler`` to enable :mod:`faulthandler`; + * ``-X showrefcount`` to enable the output of the total reference count + and memory blocks (only works on debug builds); + + It also allows to pass arbitrary values and retrieve them through the + :data:`sys._xoptions` dictionary. .. versionchanged:: 3.2 It is now allowed to pass :option:`-X` with CPython. @@ -368,6 +373,9 @@ Miscellaneous options .. versionadded:: 3.3 The ``-X faulthandler`` option. + .. versionadded:: 3.4 + The ``-X showrefcount`` option. + Options you shouldn't use ~~~~~~~~~~~~~~~~~~~~~~~~~ |