1 files changed, 5 insertions, 2 deletions
diff --git a/python/analytics/tranche_functions.py b/python/analytics/tranche_functions.py
index e9ee3ddc..cfd047f8 100644
--- a/python/analytics/tranche_functions.py
+++ b/python/analytics/tranche_functions.py
@@ -1,15 +1,18 @@
 import numpy as np
-from ctypes import *
+from ctypes import POINTER, c_int, c_double, byref
 from numpy.ctypeslib import ndpointer
 from quantlib.time.schedule import Schedule, CDS2015
-from quantlib.time.api import Actual360, Period, WeekendsOnly, ModifiedFollowing, Unadjusted
+from quantlib.time.api import (Actual360, Period, WeekendsOnly,
+                               ModifiedFollowing, Unadjusted)
 from quantlib.util.converter import pydate_to_qldate
 import pandas as pd
 from scipy.special import h_roots
 import os
 
+
 def wrapped_ndpointer(*args, **kwargs):
     base = ndpointer(*args, **kwargs)
+
     def from_param(cls, obj):
         if obj is None:
             return obj