diff --git a/wafo/containers.py b/wafo/containers.py
index 4fc4e9a..188fda5 100644
--- a/wafo/containers.py
+++ b/wafo/containers.py
@@ -523,7 +523,7 @@ def transformdata_1d(x, f, plotflag):
     transform_id = np.mod(plotflag // 10, 10)
     transform = [lambda f, x: f,
                  lambda f, x: 1 - f,
-                 cumtrapz(f, x),
+                 cumtrapz,
                  lambda f, x: 1 - cumtrapz(f, x),
                  lambda f, x: np.log(f),
                  lambda f, x: np.log1p(-f),
diff --git a/wafo/sg_filter/_core.py b/wafo/sg_filter/_core.py
index 454a404..e1cb42c 100644
--- a/wafo/sg_filter/_core.py
+++ b/wafo/sg_filter/_core.py
@@ -368,7 +368,7 @@ class _Filter(object):
         z = y
         if (1 - I).any():
             notI = ~I
-            z, L = distance_transform_edt(notI,  return_indices=True)
+            z, L = distance_transform_edt(notI, return_indices=True)
             z[notI] = y[L.flat[notI]]
 
         # coarse fast smoothing using one-tenth of the DCT coefficients
@@ -986,7 +986,7 @@ class Kalman(object):
         self._set_H(n)
         try:
             HI = np.linalg.inv(self.H)
-        except:
+        except Exception:
             HI = np.eye(n)
         self._set_P(HI)
         return HI
@@ -1112,6 +1112,7 @@ class HampelFilter(object):
     -pracma.html
 
     """
+
     def __init__(self, dx=None, t=3, adaptive=None, fulloutput=False):
         self.dx = dx
         self.t = t