1 files changed, 1 insertions, 14 deletions
diff --git a/python/analytics/option.py b/python/analytics/option.py
index a714ae17..e4b08364 100644
--- a/python/analytics/option.py
+++ b/python/analytics/option.py
@@ -10,10 +10,10 @@ from .sabr import sabr
 from .utils import GHquad, build_table
 from .index import g, ForwardIndex, CreditIndex
 from .db import _engine
+from .utils import memoize
 from yieldcurve import roll_yc
 from pandas.tseries.offsets import BDay
 
-from functools import wraps
 from pyisda.flat_hazard import pv_vec
 from scipy.optimize import brentq
 from scipy.integrate import simps
@@ -36,19 +36,6 @@ def calib(S0, fp, exercise_date, exercise_date_settle,
                 index.fixed_rate * 1e-4)
     return np.inner(pv, w) - fp
 
-def memoize(f):
-    @wraps(f)
-    def cached_f(*args, **kwargs):
-        obj = args[0]
-        key = (f.__name__, hash(obj))
-        if key in obj._cache:
-            return obj._cache[key]
-        else:
-            v = f(*args, **kwargs)
-            obj._cache[key] = v
-            return v
-    return cached_f
-
 def ATMstrike(index, exercise_date):
     """computes the at-the-money strike.