Update imports, fixing #67

aotools/functions/zernike.py

@@ -1,12 +1,6 @@
 import numpy
 from . import circle
 
-# xrange just "range" in python3.
-# This code means fastest implementation used in 2 and 3
-try:
-    xrange
-except NameError:
-    xrange = range
 
 def phaseFromZernikes(zCoeffs, size, norm="noll"):
     """
@@ -22,7 +16,7 @@ def phaseFromZernikes(zCoeffs, size, norm="noll"):
     """
     Zs = zernikeArray(len(zCoeffs), size, norm=norm)
     phase = numpy.zeros((size, size))
-    for z in xrange(len(zCoeffs)):
+    for z in range(len(zCoeffs)):
         phase += Zs[z] * zCoeffs[z]
 
     return phase
@@ -90,7 +84,7 @@ def zernikeRadialFunc(n, m, r):
 
     R = numpy.zeros(r.shape)
     # Can cast the below to "int", n,m are always *both* either even or odd
-    for i in xrange(0, int((n - m) / 2) + 1):
+    for i in range(0, int((n - m) / 2) + 1):
 
         R += numpy.array(r**(n - 2 * i) * (((-1)**(i)) *
                          numpy.math.factorial(n - i)) /
@@ -143,7 +137,7 @@ def zernikeArray(J, N, norm="noll"):
     try:
         nJ = len(J)
         Zs = numpy.empty((nJ, N, N))
-        for i in xrange(nJ):
+        for i in range(nJ):
             Zs[i] = zernike_noll(J[i], N)
 
     # Else, cast to int and create up to that number
@@ -154,16 +148,16 @@ def zernikeArray(J, N, norm="noll"):
 
         Zs = numpy.empty((maxJ, N, N))
 
-        for j in xrange(1, maxJ+1):
+        for j in range(1, maxJ+1):
             Zs[j-1] = zernike_noll(j, N)
 
 
     if norm=="p2v":
-        for z in xrange(len(Zs)):
+        for z in range(len(Zs)):
             Zs[z] /= (Zs[z].max()-Zs[z].min())
 
     elif norm=="rms":
-        for z in xrange(len(Zs)):
+        for z in range(len(Zs)):
             # Norm by RMS. Remember only to include circle elements in mean
             Zs[z] /= numpy.sqrt(
                     numpy.sum(Zs[z]**2)/numpy.sum(circle(N/2., N)))

aotools/turbulence/infinitephasescreen.py

@@ -5,18 +5,9 @@
 An implementation of the "infinite phase screen", as deduced by Francois Assemat and Richard W. Wilson, 2006.
 """
 
-from scipy.special import gamma, kv
 from scipy import linalg
-from scipy.interpolate import interp2d
 import numpy
-from numpy import pi
-
-# Numba compiles python code to machine code for faster execution
-try:
-    import numba
-except:
-    numba = None    
-
+import numba
 
 from . import phasescreen, turb
 

aotools/turbulence/phasescreen.py

@@ -11,11 +11,6 @@
 import time
 import random
 
-# Fastest range in both python2 and python3
-try:
-    xrange
-except NameError:
-    xrange = range
 
 def ft_sh_phase_screen(r0, N, delta, L0, l0, FFT=None, seed=None):
 
@@ -57,7 +52,7 @@ def ft_sh_phase_screen(r0, N, delta, L0, l0, FFT=None, seed=None):
     phs_lo = numpy.zeros(phs_hi.shape)
 
     # loop over frequency grids with spacing 1/(3^p*L)
-    for p in xrange(1,4):
+    for p in range(1,4):
         # setup the PSD
         del_f = 1 / (3**p*D) #frequency grid spacing [1/m]
         fx = numpy.arange(-1,2) * del_f
@@ -81,8 +76,8 @@ def ft_sh_phase_screen(r0, N, delta, L0, l0, FFT=None, seed=None):
                         * numpy.sqrt(PSD_phi)*del_f )
         SH = numpy.zeros((N,N),dtype="complex")
         # loop over frequencies on this grid
-        for i in xrange(0, 3):
-            for j in xrange(0, 3):
+        for i in range(0, 3):
+            for j in range(0, 3):
 
                 SH += cn[i,j] * numpy.exp(1j*2*numpy.pi*(fx[i,j]*x+fy[i,j]*y))
 

aotools/wfs/wfslib.py

@@ -4,12 +4,6 @@
 
 import numpy
 
-# Best range for python2 and 3
-try:
-    range = xrange
-except:
-    pass
-
 
 def findActiveSubaps(subaps, mask, threshold, returnFill=False):
     """