SF.net SVN: matplotlib: [5360] branches/v0_91_maint/lib/matplotlib

[<jd...@us...>]

Revision: 5360
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=5360&view=rev
Author:   jdh2358
Date:     2008-06-02 08:06:41 -0700 (Mon, 02 Jun 2008)

Log Message:
-----------
added switch_backend bugfix from sf patch 1979402

Modified Paths:
--------------
    branches/v0_91_maint/lib/matplotlib/__init__.py
    branches/v0_91_maint/lib/matplotlib/pyplot.py

Modified: branches/v0_91_maint/lib/matplotlib/__init__.py
===================================================================
--- branches/v0_91_maint/lib/matplotlib/__init__.py	2008-06-02 14:54:41 UTC (rev 5359)
+++ branches/v0_91_maint/lib/matplotlib/__init__.py	2008-06-02 15:06:41 UTC (rev 5360)
@@ -733,7 +733,7 @@
 or matplotlib.backends is imported for the first time.
 """
 
-def use(arg):
+def use(arg, warn=True):
     """
     Set the matplotlib backend to one of the known backends.
 
@@ -745,12 +745,17 @@
 
     will specify a default of pdf output generated by Cairo.
 
-    Note: this function must be called *before* importing pylab
-    for the first time; or, if you are not using pylab, it must
-    be called before importing matplotlib.backends.
+    Note: this function must be called *before* importing pylab for
+    the first time; or, if you are not using pylab, it must be called
+    before importing matplotlib.backends.  If warn is True, a warning
+    is issued if you try and callthis after pylab or pyplot have been
+    loaded.  In certain black magic use cases, eg
+    pyplot.switch_backends, we are doing the reloading necessary to
+    make the backend switch work (in some cases, eg pure image
+    backends) so one can set warn=False to supporess the warnings
     """
     if 'matplotlib.backends' in sys.modules:
-        warnings.warn(_use_error_msg)
+        if warn: warnings.warn(_use_error_msg)
     be_parts = arg.split('.')
     name = validate_backend(be_parts[0])
     rcParams['backend'] = name

Modified: branches/v0_91_maint/lib/matplotlib/pyplot.py
===================================================================
--- branches/v0_91_maint/lib/matplotlib/pyplot.py	2008-06-02 14:54:41 UTC (rev 5359)
+++ branches/v0_91_maint/lib/matplotlib/pyplot.py	2008-06-02 15:06:41 UTC (rev 5360)
@@ -50,12 +50,12 @@
     """
     close('all')
     global new_figure_manager, draw_if_interactive, show
-    matplotlib.use(newbackend)
-    reload(backends)
-    from backends import new_figure_manager, draw_if_interactive, show
+    matplotlib.use(newbackend, warn=False)
+    reload(matplotlib.backends)
+    from matplotlib.backends import pylab_setup
+    new_figure_manager, draw_if_interactive, show = pylab_setup()
 
 
-
 def isinteractive():
     """
     Return the interactive status


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