symbol_sequence.py: make a docstring raw.

[sage.d.git] / mjo / symbol_sequence.py

diff --git a/mjo/symbol_sequence.py b/mjo/symbol_sequence.py
index 2abf41b786f709afa8581c8509fd4ee6944ae0a4..3878b7505ba2c34289c1cc3e3b558d82bed1cfc4 100644 (file)
--- 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).
 
@@ -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: