Replace dump() with define __str__ in AdaptiveScalarEncoder. Issue nu…

…menta#1518

src/nupic/encoders/adaptivescalar.py

@@ -195,22 +195,9 @@ def topDownCompute(self, encoded):
     return super(AdaptiveScalarEncoder, self).topDownCompute(encoded)
 
 
-  def dump(self):
-    """
-    Prints details about current state to stdout.
-    """
-    print "AdaptiveScalarEncoder:"
-    print "  min: %f" % self.minval
-    print "  max: %f" % self.maxval
-    print "  w:   %d" % self.w
-    print "  n:   %d" % self.n
-    print "  resolution: %f" % self.resolution
-    print "  radius:     %f" % self.radius
-    print "  periodic: %s" % self.periodic
-    print "  nInternal: %d" % self.nInternal
-    print "  rangeInternal: %f" % self.rangeInternal
-    print "  padding: %d" % self.padding
-
+  def __str__(self):
+    return "AdaptiveScalarEncoder\nmin: %f\nmax: %f\nw: %d\nn: %d\nresolution: %f\nradius: %f\nperiodic: %f\nnInternal: %f\nrangeInternal: %f\npadding: %d" \
+            % (self.minval, self.maxval, self.w, self.n, self.resolution, self.radius, self.periodic, self.nInternal, self.rangeInternal, self.padding)
 
   @classmethod
   def read(cls, proto):