fixed whitespace parsing in mpl_functions.set_spines() and added spin…

…e_spec example

examples/example_spine_spec.py

@@ -0,0 +1,4 @@
+import figurefirst as fifi
+layout = fifi.FigureLayout('example_spine_spec_layout.svg',make_mplfigures = True)
+fifi.mpl_functions.set_spines(layout)
+layout.save('example_spine_spec_output.svg')

figurefirst/mpl_functions.py

@@ -116,7 +116,7 @@ def kill_all_labels(layout):
 def set_spines(layout):
     for ax in layout.axes.values():
         if 'spinespec' in ax.__dict__:
-            adjust_spines(ax,ax.spinespec.split(','))
+            adjust_spines(ax,[sp.strip() for sp in ax.spinespec.split(',')])
 
 def set_fontsize(fig,fontsize):
     """

figurefirst/svg_to_axes.py

@@ -590,11 +590,12 @@ def __init__(self, layout_filename, autogenlayers=True,make_mplfigures = False,
             print('Warning: key error - probably loading a layout with missing links, like missing figurefirst:template targets.')
         #add the spinespecs
         for ax in self.axes.values():
-            for node in ax.node.childNodes:
-                if node.nodeType == 1:
-                    if node.tagName == 'figurefirst:spinespec':
-                        ax.spinespec = node.getAttribute('figurefirst:spinelist')
-        #self.load_svgitems()
+            if not(ax.node is None):
+                for node in ax.node.childNodes:
+                    if node.nodeType == 1:
+                        if node.tagName == 'figurefirst:spinespec':
+                            ax.spinespec = node.getAttribute('figurefirst:spinelist')
+            #self.load_svgitems()
 
         # dont allow sx and sy to differ
         # inkscape seems to ignore inconsistent aspect ratios by