matplotlib
diff --git a/‎lib/matplotlib/sphinxext/plot_directive.py
Copy file name to clipboardExpand all lines: lib/matplotlib/sphinxext/plot_directive.py
+2-2Lines changed: 2 additions & 2 deletions b/‎lib/matplotlib/sphinxext/plot_directive.py
Copy file name to clipboardExpand all lines: lib/matplotlib/sphinxext/plot_directive.py
+2-2Lines changed: 2 additions & 2 deletions
@@ -539,7 +539,7 @@ def render_figures(code, code_path, output_dir, output_base, context,
                    function_name, config, context_reset=False,
                    close_figs=False,
                    code_includes=None,
-                   outname=''):
+                   outname=None):
     """
     Run a pyplot script and save the images in *output_dir*.
 
@@ -635,7 +635,7 @@ def render_figures(code, code_path, output_dir, output_base, context,
             for fmt, dpi in formats:
                 try:
                     figman.canvas.figure.savefig(img.filename(fmt), dpi=dpi)
-                    if config.plot_preserve_dir and outname:
+                    if config.plot_preserve_dir and outname is not None:
                         _log.info(
                             "Preserving '{0}' into '{1}'".format(
                                 img.filename(fmt), config.plot_preserve_dir))