syntax cleanup

BioPandas · Nov 22, 2015 · 28b6ca9 · 28b6ca9
1 parent 0d9c4df
commit 28b6ca9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/biopandas/pandas_pdb.py b/biopandas/pandas_pdb.py
@@ -17,7 +17,7 @@
     from urllib.request import urlopen
     from urllib.error import HTTPError, URLError
 except ImportError:
-    from urllib2 import urlopen, Request, HTTPError, URLError
+    from urllib2 import urlopen, HTTPError, URLError
 from .engines import pdb_records
 
 class PandasPDB(object):
@@ -73,7 +73,7 @@ def rmsd(df1, df2, s='no hydrogen'):
 
         total = ((df1['x_coord'] - df2['x_coord'])**2 +
                 (df1['y_coord'] - df2['y_coord'])**2 +
-                (df1['z_coord'] - df2['z_coord'])**2) +
+                (df1['z_coord'] - df2['z_coord'])**2)
         rmsd = round(( total.sum() / df1.shape[0] )**0.5, 4)
         return rmsd