From a551aa81c6dd091cf9a363ca83f3726fb83e35d3 Mon Sep 17 00:00:00 2001
From: Leo Singer <leo.singer@nasa.gov>
Date: Wed, 11 Mar 2015 08:19:28 -0400
Subject: [PATCH] Replace xrange with six.moves.xrange to support Python 3

Also add missing dependency on six. Fixes #226.
---
 healpy/fitsfunc.py | 3 ++-
 healpy/projaxes.py | 3 ++-
 requirements.txt   | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/healpy/fitsfunc.py b/healpy/fitsfunc.py
index 3db127a53..ea1722e53 100644
--- a/healpy/fitsfunc.py
+++ b/healpy/fitsfunc.py
@@ -24,6 +24,7 @@
 except ImportError:
     import pyfits as pf
 import numpy as np
+import six
 from . import pixelfunc
 from .sphtfunc import Alm
 import warnings
@@ -422,7 +423,7 @@ def mwrfits(filename,data,hdu=1,colnames=None,keys=None):
     else:
         colnames = ['']*len(data)
     cols=[]
-    for line in xrange(len(data)):
+    for line in six.moves.xrange(len(data)):
         cols.append(pf.Column(name=colnames[line],
                                format=getformat(data[line]),
                                array=data[line]))
diff --git a/healpy/projaxes.py b/healpy/projaxes.py
index 7c07ed9af..02384b1d9 100644
--- a/healpy/projaxes.py
+++ b/healpy/projaxes.py
@@ -23,6 +23,7 @@
 import matplotlib
 from matplotlib import axes,ticker,colors,cm,lines,cbook,figure
 import numpy as np
+import six
 from ._healpy_pixel_lib import UNSEEN
 
 pi = np.pi
@@ -394,7 +395,7 @@ def _make_segment(self,x,y,threshold=None):
         elif len(w) >= 2:
             xx.append(x[0:w[0]])
             yy.append(y[0:w[0]])
-            for i in xrange(len(w)-1):
+            for i in six.moves.xrange(len(w)-1):
                 xx.append(x[w[i]:w[i+1]])
                 yy.append(y[w[i]:w[i+1]])
             xx.append(x[w[-1]:])
diff --git a/requirements.txt b/requirements.txt
index 9015685bf..1a57d05e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ numpy
 cython>=0.16
 matplotlib
 astropy
+six