patch for enables function draw_networkx_edge_labels to set fontproperties.

nx_pylab.py.patch

--- networkx-1.5/networkx/drawing/nx_pylab.py	2011-06-04 09:45:38.000000000 +0900
+++ nx_pylab.py	2011-10-01 01:48:06.000000000 +0900
@@ -21,7 +21,8 @@
 #    All rights reserved.
 #    BSD license.
 
-__all__ = ['draw',
+__all__ = ['set_fontproperties',
+           'draw',
            'draw_networkx',
            'draw_networkx_nodes',
            'draw_networkx_edges',
@@ -38,6 +39,13 @@
 import networkx as nx
 from networkx.drawing.layout import shell_layout,\
     circular_layout,spectral_layout,spring_layout,random_layout
+import matplotlib.font_manager
+
+font_path = matplotlib.font_manager.fontManager.defaultFont['ttf']
+fontproperties = matplotlib.font_manager.FontProperties(fname=font_path)
+def set_fontproperties(font):
+    global fontproperties
+    fontproperties = font
 
 def draw(G, pos=None, ax=None, hold=None, **kwds):
     """Draw the graph G with Matplotlib (pylab).
@@ -718,9 +726,10 @@
         if not cb.is_string_like(label):
             label=str(label) # this will cause "1" and 1 to be labeled the same
         t=ax.text(x, y,
-                  label,
+                  unicode(label),
                   size=font_size,
                   color=font_color,
+                  fontproperties=fontproperties,
                   family=font_family,
                   weight=font_weight,
                   horizontalalignment=horizontalalignment,
@@ -849,9 +858,10 @@
         verticalalignment=kwds.get('verticalalignment','center')
 
         t=ax.text(x, y,
-                  label,
+                  unicode(label),
                   size=font_size,
                   color=font_color,
+                  fontproperties=fontproperties,
                   family=font_family,
                   weight=font_weight,
                   horizontalalignment=horizontalalignment,