diff --git a/bdsf/opts.py b/bdsf/opts.py
index 7e9f428..e1a6763 100644
--- a/bdsf/opts.py
+++ b/bdsf/opts.py
@@ -34,7 +34,7 @@ class Op_new_op(Op):
 from __future__ import absolute_import
 
 from .tc import Int, Float, Bool, String, Tuple, Enum, \
-    Option, NArray, Instance, tInstance, List, Any, TCInit, tcError
+    Option, tInstance, List, TCInit, tcError
 
 try:
     # For Python 2
diff --git a/bdsf/polarisation.py b/bdsf/polarisation.py
index e1eda7e..a3d2864 100644
--- a/bdsf/polarisation.py
+++ b/bdsf/polarisation.py
@@ -18,7 +18,6 @@
 from .gausfit import Op_gausfit
 from .gaul2srl import Op_gaul2srl
 from .make_residimage import Op_make_residimage
-from .const import fwsig
 from . import mylogger
 import numpy as N
 from . import functions as func
diff --git a/bdsf/preprocess.py b/bdsf/preprocess.py
index b5cfd61..25ca97a 100644
--- a/bdsf/preprocess.py
+++ b/bdsf/preprocess.py
@@ -8,8 +8,7 @@
 import numpy as N
 from . import _cbdsm
 from .image import *
-from math import pi, sqrt, log
-from . import const
+from math import pi
 from . import functions as func
 from . import mylogger
 
diff --git a/bdsf/psf_vary.py b/bdsf/psf_vary.py
index 6343ceb..1c3d99d 100644
--- a/bdsf/psf_vary.py
+++ b/bdsf/psf_vary.py
@@ -2,15 +2,11 @@
 from __future__ import absolute_import
 
 import numpy as N
-from astropy.io import fits as pyfits
 from .image import *
 from . import mylogger
-from copy import deepcopy as cp
 from . import has_pl
 if has_pl:
     import matplotlib.pyplot as pl
-import scipy
-import scipy.signal as S
 from . import _cbdsm
 from . import functions as func
 from . import _pytesselate as _pytess
diff --git a/bdsf/rmsimage.py b/bdsf/rmsimage.py
index e73567e..2b70589 100644
--- a/bdsf/rmsimage.py
+++ b/bdsf/rmsimage.py
@@ -12,7 +12,7 @@
 import numpy as N
 import scipy.ndimage as nd
 from . import _cbdsm
-from .image import Op, Image, NArray, List
+from .image import Op
 from . import const
 from . import mylogger
 import os
diff --git a/bdsf/statusbar.py b/bdsf/statusbar.py
index 56d676a..c9cbe17 100644
--- a/bdsf/statusbar.py
+++ b/bdsf/statusbar.py
@@ -1,7 +1,6 @@
 """Display an animated statusbar"""
 from __future__ import absolute_import
 import sys
-import os
 from . import functions as func
 
 class StatusBar():
diff --git a/bdsf/threshold.py b/bdsf/threshold.py
index b27d50f..c4fcfc4 100644
--- a/bdsf/threshold.py
+++ b/bdsf/threshold.py
@@ -13,7 +13,7 @@
 from __future__ import absolute_import
 
 import numpy as N
-from .image import Op, Image, NArray
+from .image import Op
 from math import sqrt,pi,log
 from scipy.special import erfc
 from . import const