symbol_sequence.py: use xrange where applicable.

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

diff --git a/mjo/symbol_sequence.py b/mjo/symbol_sequence.py
index cd9e02dc675f0bea6f05d64ba277fab5aa1d8564..2abf41b786f709afa8581c8509fd4ee6944ae0a4 100644 (file)
--- a/mjo/symbol_sequence.py
+++ b/mjo/symbol_sequence.py
@@ -20,6 +20,10 @@ class SymbolSequence:
 
     An iterable object containing symbolic expressions.
 
+    SETUP::
+
+        sage: from mjo.symbol_sequence import SymbolSequence
+
     EXAMPLES:
 
     The simplest use case::
@@ -34,7 +38,7 @@ class SymbolSequence:
     degree::
 
         sage: a = SymbolSequence('a')
-        sage: p = sum([ a[i]*x^i for i in range(0,5)])
+        sage: p = sum( a[i]*x^i for i in xrange(5) )
         sage: p
         a_4*x^4 + a_3*x^3 + a_2*x^2 + a_1*x + a_0
 
@@ -53,7 +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 xrange(2) for j in xrange(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
@@ -117,6 +121,10 @@ class SymbolSequence:
         appropriate name and latex_name before delegating to
         SR.symbol().
 
+        SETUP::
+
+            sage: from mjo.symbol_sequence import SymbolSequence
+
         EXAMPLES::
 
             sage: a = SymbolSequence('a', 'alpha', 'real')
@@ -147,6 +155,10 @@ class SymbolSequence:
         more than can be said about some of the snappier solutions of
         lore.
 
+        SETUP::
+
+            sage: from mjo.symbol_sequence import SymbolSequence
+
         EXAMPLES::
 
             sage: a = SymbolSequence('a')
@@ -177,6 +189,10 @@ class SymbolSequence:
         tuples. It just hands off the real work to
         self._subscript_foo_().
 
+        SETUP::
+
+            sage: from mjo.symbol_sequence import SymbolSequence
+
         EXAMPLES:
 
         An integer argument::
@@ -215,6 +231,10 @@ class SymbolSequence:
         The subscript is a single integer, or something that acts like
         one.
 
+        SETUP::
+
+            sage: from mjo.symbol_sequence import SymbolSequence
+
         EXAMPLES::
 
             sage: a = SymbolSequence('a')
@@ -239,6 +259,10 @@ class SymbolSequence:
         first. The start/step are default for lists. We make
         copies of these because they're read-only.
 
+        SETUP::
+
+            sage: from mjo.symbol_sequence import SymbolSequence
+
         EXAMPLES::
 
             sage: a = SymbolSequence('a')
@@ -259,7 +283,7 @@ class SymbolSequence:
         # If the user asks for a slice, we'll be returning a list
         # of symbols.
         return [ self._subscript_integer_(idx)
-                 for idx in range(start, s.stop, step) ]
+                 for idx in xrange(start, s.stop, step) ]
 
 
 
@@ -268,6 +292,10 @@ class SymbolSequence:
         When we have more than one level of subscripts, we pick off
         the first one and generate the rest recursively.
 
+        SETUP::
+
+            sage: from mjo.symbol_sequence import SymbolSequence
+
         EXAMPLES:
 
         A simple two-tuple::
@@ -300,8 +328,8 @@ class SymbolSequence:
         # corresponding to the second coordinate, with the first
         # coordinate(s) fixed.
         if isinstance(key, slice):
-            ss = [ SymbolSequence(w._repr_(), w._latex_(), self._domain)
-                   for w in v ]
+            ss = ( SymbolSequence(w._repr_(), w._latex_(), self._domain)
+                   for w in v )
 
             # This might be nested...
             maybe_nested_list = [ s._subscript_tuple_(args) for s in ss ]