document IOBase.__del__'s behavior (closes #21764)

Patch from Nikolaus Rath.

document IOBase.del's behavior (closes #21764)
Patch from Nikolaus Rath.
efda558b · Benjamin Peterson · 8d24d77c · efda558b
Commit efda558b authored Jun 14, 2014 by Benjamin Peterson
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Doc/library/io.rst Doc/library/io.rst +6 -0

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--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -346,6 +346,12 @@ I/O Base Classes
      is usual for each of the lines provided to have a line separator at the
      end.

+   .. method:: __del__()
+
+      Prepare for object destruction. :class:`IOBase` provides a default
+      implementation of this method that calls the instance's
+      :meth:`~IOBase.close` method.
+

 .. class:: RawIOBase