add __hash__ method

1 files changed, 10 insertions, 1 deletions

diff --git a/pyisda/curve.pyx b/pyisda/curve.pyx
index cbe2174..730e066 100644
--- a/pyisda/curve.pyx
+++ b/pyisda/curve.pyx
@@ -34,7 +34,7 @@ cdef class Curve(object):
 
     def __getstate__(self):
         cdef TCurve* curve = self._thisptr.get()
-        cdef int num_items = curve.fNumItems;
+        cdef int num_items = curve.fNumItems
         return (num_items,
                 <bytes>(<char*>curve.fArray)[:sizeof(TRatePt)*num_items],
                 curve.fBaseDate,
@@ -59,6 +59,15 @@ cdef class Curve(object):
         new_curve.fDayCountConv = dcc
         self._thisptr = make_shared(new_curve)
 
+    def __hash__(self):
+        cdef TCurve* curve = self._thisptr.get()
+        cdef int num_items = curve.fNumItems
+        return hash((num_items,
+                     <bytes>(<char*>curve.fArray)[:sizeof(TRatePt)*num_items],
+                     curve.fBaseDate,
+                     curve.fBasis,
+                     curve.fDayCountConv))
+
     def inspect(self):
         """ method to inspect the content of the C struct