check None early

1 files changed, 3 insertions, 3 deletions

diff --git a/pyisda/legs.pyx b/pyisda/legs.pyx
index fa82629..9f51d77 100644
--- a/pyisda/legs.pyx
+++ b/pyisda/legs.pyx
@@ -43,7 +43,7 @@ cdef class ContingentLeg:
                      self._thisptr.endDate,
                      self._thisptr.notional,
                      self._thisptr.protectStart))
-    
+
     @property
     def end_date(self):
         return TDate_to_pydate(self._thisptr.endDate)
@@ -162,8 +162,8 @@ cdef class FeeLeg:
             result.append((TDate_to_pydate(cf.fDate), cf.fAmount))
         return result
 
-    def pv(self, today, step_in_date, value_date, YieldCurve yc, SpreadCurve sc,
-           bint pay_accrued_at_start):
+    def pv(self, today, step_in_date, value_date, YieldCurve yc not None,
+           SpreadCurve sc not None, bint pay_accrued_at_start):
         """
         Present Value of FeeLeg cashflows.