Merge branch 'pr45': improve unicode support

ecdsa/ellipticcurve.py

@@ -34,10 +34,10 @@
 
 from __future__ import division
 
-from .six import print_
+from .six import print_, python_2_unicode_compatible
 from . import numbertheory
 
-
+@python_2_unicode_compatible
 class CurveFp(object):
   """Elliptic Curve over the field of integers modulo a prime."""
   def __init__(self, p, a, b):
@@ -59,6 +59,8 @@ def contains_point(self, x, y):
     """Is the point (x,y) on this curve?"""
     return (y * y - (x * x * x + self.__a * x + self.__b)) % self.__p == 0
 
+  def __str__(self):
+    return "CurveFp(p=%d, a=%d, b=%d)" % (self.__p, self.__a, self.__b)
 
 class Point(object):
   """A point on an elliptic curve. Altering x and y is forbidding,