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| author | Victor Stinner <victor.stinner@gmail.com> | 2017-11-21 02:59:50 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-11-21 02:59:50 (GMT) |
| commit | bc9b6e29cb52f8da15613f9174af2f603131b56d (patch) | |
| tree | 87fdd957feefa292457ac25c7f71c9288ade7790 /Doc/using/cmdline.rst | |
| parent | 25420fe290b98171e6d30edf9350292c21ef700e (diff) | |
| download | cpython-bc9b6e29cb52f8da15613f9174af2f603131b56d.zip cpython-bc9b6e29cb52f8da15613f9174af2f603131b56d.tar.gz cpython-bc9b6e29cb52f8da15613f9174af2f603131b56d.tar.bz2 | |
bpo-32043: Rephrase -X dev documentation (#4478)
* should not be more verbose if the code is correct
* enabled checks can be "expensive"
Diffstat (limited to 'Doc/using/cmdline.rst')
| -rw-r--r-- | Doc/using/cmdline.rst | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst index 8e186b3..fc557ee 100644 --- a/Doc/using/cmdline.rst +++ b/Doc/using/cmdline.rst @@ -411,8 +411,10 @@ Miscellaneous options nested imports). Note that its output may be broken in multi-threaded application. Typical usage is ``python3 -X importtime -c 'import asyncio'``. See also :envvar:`PYTHONPROFILEIMPORTTIME`. - * ``-X dev`` enables the "developer mode": enable debug checks at runtime. - Developer mode: + * ``-X dev``: enable CPython's "developer mode", introducing additional + runtime checks which are too expensive to be enabled by default. It should + not be more verbose than the default if the code is correct: new warnings + are only emitted when an issue is detected. Effect of the developer mode: * Warning filters: add a filter to display all warnings (``"default"`` action), except of :exc:`BytesWarning` which still depends on the @@ -441,8 +443,7 @@ Miscellaneous options The ``-X showalloccount`` option. .. versionadded:: 3.7 - The ``-X importtime``, ``-X dev`` and :envvar:`PYTHONPROFILEIMPORTTIME` - options. + The ``-X importtime`` and ``-X dev`` options. Options you shouldn't use |