fixed a bug in ticker.py that was causing a ZeroDivisionError

ddale · ddale · commit b9e6cba64222 · 2005-06-03T15:42:09.000Z
svn path=/trunk/matplotlib/; revision=1413
diff --git a/CHANGELOG b/CHANGELOG
@@ -1,5 +1,7 @@
 New entries should be added at the top
 
+2005-06-03 Fixed a bug in ticker.py causing a ZeroDivisionError
+
 2005-06-02 backend_gtk.py remove DBL_BUFFER, add line to expose_event to
            try to fix pygtk 2.6 redraw problem - SC
 
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
@@ -143,7 +143,7 @@ class Formatter(TickHelper):
 
     # some classes want to see all the locs to help format
     # individual ones    
-    locs = None 
+    locs = []
     def __call__(self, x, pos=0):
         'Return the format for tick val x at position pos'
         raise NotImplementedError('Derived must overide')
@@ -201,7 +201,7 @@ def __call__(self, x, pos=0):
         return self.fmt % x
 
 
-class _ScalarFormatter(Formatter):
+class OldScalarFormatter(Formatter):
     """
     Tick location is a plain old number.  If viewInterval is set, the
     formatter will use %d, %1.#f or %1.ef as appropriate.  If it is
@@ -260,7 +260,7 @@ def __init__(self, useOffset=True, useMathText=False):
         
     def __call__(self, x, pos=0):
         'Return the format for tick val x at position pos'  
-        if self.locs==None:
+        if len(self.locs)==0:
             return ''
         else:
             return self.pprint_val(x)
@@ -272,7 +272,7 @@ def format_data(self,value):
         
     def get_offset(self):
         """Return scientific notation, plus offset"""
-        if self.locs==None: return ''
+        if len(self.locs)==0: return ''
         if self.orderOfMagnitude or self.offset:
             offsetStr = ''
             sciNotStr = ''
@@ -289,7 +289,7 @@ def get_offset(self):
     def set_locs(self, locs):
         'set the locations of the ticks'
         self.locs = locs
-        if self.locs != None:
+        if len(self.locs) > 0:
             self.verify_intervals()
             d = abs(self.viewInterval.span())
             if self._useOffset: self._set_offset(d)
