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Add Tkinter threading change

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Andrew M. Kuchling 2002-12-13 12:53:16 +00:00
parent 71fd01c099
commit 6c50df2d90
1 changed files with 17 additions and 3 deletions
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Doc/whatsnew/whatsnew23.tex
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@ -1286,7 +1286,7 @@ sometimes have odd bugs. Brett Cannon contributed a portable
implementation that's written in pure Python, which should behave implementation that's written in pure Python, which should behave
identically on all platforms. identically on all platforms.
\item The \module{UserDict) has a new \class{DictMixin} class which \item The \module{UserDict} module has a new \class{DictMixin} class which
defines all dictionary methods for classes that already have a minimum defines all dictionary methods for classes that already have a minimum
mapping interface. This greatly simplifies writing classes that need mapping interface. This greatly simplifies writing classes that need
to be substitutable for dictionaries, such as the classes in to be substitutable for dictionaries, such as the classes in
@ -1294,7 +1294,7 @@ the \module{shelve} module.
Adding the mixin as a superclass provides the full dictionary Adding the mixin as a superclass provides the full dictionary
interface whenever the class defines \method{__getitem__}, interface whenever the class defines \method{__getitem__},
\method{__setitem__}, \method{__delitem__), and \method{keys}. \method{__setitem__}, \method{__delitem__}, and \method{keys}.
For example: For example:
\begin{verbatim} \begin{verbatim}
@ -1371,6 +1371,20 @@ stamps, or if they use the tuple API. If used, the feature should be
activated on an application level instead of trying to enable it on a activated on an application level instead of trying to enable it on a
per-use basis. per-use basis.
\item The \module{Tkinter} module now works with a thread-enabled
version of Tcl. Tcl's threading model requires that widgets only be
accessed from the thread in which they're created; accesses from
another thread can cause Tcl to panic. For certain Tcl interfaces,
\module{Tkinter} will now automatically avoid this by marshalling a
command, passing it to the correct thread, and waiting for the results
when a widget is accessed from a different thread. Other interfaces
can't be handled automatically but \module{Tkinter} will now raise an
exception on such an access so that you can at least find out about
the problem. See
\url{http://mail.python.org/pipermail/python-dev/2002-December/031107.html}
for a more detailed explanation of this change. (Implemented by
Martin von L\"owis.)
\item Calling Tcl methods through \module{_tkinter} no longer \item Calling Tcl methods through \module{_tkinter} no longer
returns only strings. Instead, if Tcl returns other objects those returns only strings. Instead, if Tcl returns other objects those
objects are converted to their Python equivalent, if one exists, or objects are converted to their Python equivalent, if one exists, or
@ -1392,7 +1406,7 @@ import Tkinter
Tkinter.wantobjects = 0 Tkinter.wantobjects = 0
\end{verbatim} \end{verbatim}
Please report any breakage caused by this change as a bug. Any breakage caused by this change should be reported as a bug.
\end{itemize} \end{itemize}