no need to be generic

1 files changed, 6 insertions, 6 deletions

diff --git a/pyisda/curve.pyx b/pyisda/curve.pyx
index 60858b8..99d880a 100644
--- a/pyisda/curve.pyx
+++ b/pyisda/curve.pyx
@@ -50,7 +50,7 @@ cdef class Curve(object):
     @classmethod
     def from_bytes(cls, bytes state):
         cdef:
-            Curve instance = cls.__new__(cls)
+            Curve instance = Curve.__new__(Curve)
             unsigned char* cursor = state
             TCurve* curve = <TCurve*>malloc(sizeof(TCurve))
         unserialize(cursor, curve)
@@ -119,7 +119,7 @@ cdef class Curve(object):
         return self._thisptr.get().fNumItems
 
     def __deepcopy__(self, memo):
-        cdef Curve sc = type(self).__new__(type(self))
+        cdef Curve sc = Curve.__new__(Curve)
         sc._thisptr = make_shared(JpmcdsCopyCurve(self._thisptr.get()))
         return sc
 
@@ -303,7 +303,7 @@ cdef class YieldCurve(Curve):
     @classmethod
     def from_bytes(cls, bytes state):
         cdef:
-            YieldCurve instance = cls.__new__(cls)
+            YieldCurve instance = YieldCurve.__new__(YieldCurve)
             unsigned char* cursor = state
             TCurve* curve = <TCurve*>malloc(sizeof(TCurve))
             size_t num_instr
@@ -336,7 +336,7 @@ cdef class YieldCurve(Curve):
     def from_discount_factors(cls, base_date, list dates, double[:] dfs, str day_count_conv):
         """ build a yield curve from a list of discount factors """
         cdef TDate base_date_c = pydate_to_TDate(base_date)
-        cdef YieldCurve yc = cls.__new__(cls)
+        cdef YieldCurve yc = YieldCurve.__new__(YieldCurve)
         yc.dates = vector[TDate](len(dates))
         cdef size_t i
         cdef double* rates = <double*>malloc(sizeof(double) * yc.dates.size())
@@ -521,7 +521,7 @@ cdef class SpreadCurve(Curve):
     @classmethod
     def from_bytes(cls, bytes state):
         cdef:
-            SpreadCurve instance = cls.__new__(cls)
+            SpreadCurve instance = SpreadCurve.__new__(SpreadCurve)
             unsigned char* cursor = state
             TCurve* curve = <TCurve*>malloc(sizeof(TCurve))
             size_t ticker_length
@@ -568,7 +568,7 @@ cdef class SpreadCurve(Curve):
 
         """
         cdef TDate base_date_c = pydate_to_TDate(base_date)
-        cdef SpreadCurve sc = cls.__new__(cls)
+        cdef SpreadCurve sc = SpreadCurve.__new__(SpreadCurve)
         cdef TDate max_date = 200000 # can go higher but this should be more than enough
 
         sc._thisptr = make_shared(JpmcdsMakeTCurve(base_date_c, &max_date, &rate, 1,