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Added deprecation notices for Qt3-based backends. #1225

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Merged
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Sep 10, 2012
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Added deprecation notices for Qt3-based backends. #1225

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5 changes: 5 additions & 0 deletions doc/api/api_changes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,11 @@ Changes in 1.2.x
* ``twinx`` and ``twiny`` now returns an instance of SubplotBase if
parent axes is an instance of SubplotBase.

* All Qt3-based backends are now deprecated due to the lack of py3k bindings.
Qt and QtAgg backends will continue to work in v1.2.x for py2.6
and py2.7. It is anticipated that the Qt3 support will be completely
removed for the next release.


Changes in 1.1.x
================
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3 changes: 2 additions & 1 deletion doc/users/whats_new.rst
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Expand Up @@ -34,7 +34,8 @@ project.
The following GUI backends work under Python 3.x: Gtk3Agg, Gtk3Cairo,
Qt4Agg, TkAgg and MacOSX. The other GUI backends do not yet have
adequate bindings for Python 3.x, but continue to work on Python 2.6
and 2.7. The non-GUI backends, such as PDF, PS and SVG, work on both
and 2.7, particularly the Qt and QtAgg backends (which have been
deprecated). The non-GUI backends, such as PDF, PS and SVG, work on both
Python 2.x and 3.x.

Features that depend on the Python Imaging Library, such as JPEG
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9 changes: 8 additions & 1 deletion lib/matplotlib/backends/backend_qt.py
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Expand Up @@ -2,6 +2,11 @@
import math
import os
import sys
import warnings

warnings.warn("QT3-based backends are deprecated and will be removed after"
" the v1.2.x release. Use the equivalent QT4 backend instead.",
DeprecationWarning)

import matplotlib
from matplotlib import verbose
Expand All @@ -18,7 +23,9 @@
try:
import qt
except ImportError:
raise ImportError("Qt backend requires pyqt to be installed.")
raise ImportError("Qt backend requires pyqt to be installed."
" NOTE: QT3-based backends will not work in"
" Python 3.")

backend_version = "0.9.1"
def fn_name(): return sys._getframe(1).f_code.co_name
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