some fixes for python3 compatibility

gwinc/struct.py

@@ -166,7 +166,7 @@ class Struct(object):
         """
         txt = io.StringIO()
         for k, v in sorted(self.walk()):
-            if isinstance(v, (int, long, float, complex)):
+            if isinstance(v, (int, float, complex)):
                 base = fmt
             elif isinstance(v, np.ndarray):
                 v = np.array2string(v, separator='', max_line_width=np.Inf, formatter={'all':lambda x: "{:0.6e} ".format(x)})

gwinc/test/__main__.py

@@ -63,7 +63,7 @@ def main():
     freq = np.logspace(np.log10(FLO), np.log10(FHI), NPOINTS)
 
     mdata_pkl = os.path.join(os.path.dirname(__file__), '{}.pkl'.format(args.IFO))
-    ifo_hash = hashlib.sha1(ifo.to_txt()).hexdigest()
+    ifo_hash = hashlib.sha1(ifo.to_txt().encode()).hexdigest()
     gwinc_hash = path_hash(os.getenv('GWINCPATH'))
 
     mrecalc = True