X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=mjo%2Fsymbol_sequence.py;h=563bab6ad4d190f0cbcaa82e428acc6ea86e2ddf;hb=b760d6ffe2554def684bf1118fff22072b8cf781;hp=b7c438fa02fda1702f6df4fd5a6f1b3a41fce7b0;hpb=0f82bb9c56eb8c7069e20e1948504deac213169e;p=sage.d.git

diff --git a/mjo/symbol_sequence.py b/mjo/symbol_sequence.py
index b7c438f..563bab6 100644
--- a/mjo/symbol_sequence.py
+++ b/mjo/symbol_sequence.py
@@ -1,7 +1,7 @@
 from sage.all import *
 
 class SymbolSequence:
-    """
+    r"""
     An iterable object which acts like a sequence of symbolic
     expressions (variables).
 
@@ -57,7 +57,7 @@ class SymbolSequence:
         a_0_1_2
         sage: latex(a[0,1,2])
         a_{0}_{1}_{2}
-        sage: [ a[i,j] for i in range(0,2) for j in range(0,2) ]
+        sage: [ a[i,j] for i in range(2) for j in range(2) ]
         [a_0_0, a_0_1, a_1_0, a_1_1]
 
     You can pass slices instead of integers to obtain a list of
@@ -175,9 +175,10 @@ class SymbolSequence:
         result = []
 
         for item in l:
-            if isinstance(item, list):
+            try:
+                item = iter(item)
                 result += self._flatten_list_(item)
-            else:
+            except TypeError:
                 result += [item]
 
         return result
@@ -332,7 +333,7 @@ class SymbolSequence:
                    for w in v )
 
             # This might be nested...
-            maybe_nested_list = [ s._subscript_tuple_(args) for s in ss ]
+            maybe_nested_list = ( s._subscript_tuple_(args) for s in ss )
             return self._flatten_list_(maybe_nested_list)
 
         else: