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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/sys.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst index 6f1aaff..94e4eb9 100644 --- a/Doc/library/sys.rst +++ b/Doc/library/sys.rst @@ -513,6 +513,13 @@ always available. could be useful to restore the actual files to known working file objects in case they have been overwritten with a broken object. + .. note:: + + Under some conditions ``stdin``, ``stdout`` and ``stderr`` as well as the + original values ``__stdin__``, ``__stdout__`` and ``__stderr__`` can be + None. It is usually the case for Windows GUI apps that aren't connected to + a console and Python apps started with :program:`pythonw`. + .. data:: tracebacklimit @@ -571,3 +578,4 @@ always available. Module :mod:`site` This describes how to use .pth files to extend ``sys.path``. + |