Changeset 7396:9b0c6709d509

Timestamp:

11/21/07 06:10:41 (6 years ago)

Author:

William Stein <wstein@…>

Branch:

default

Message:

Maybe a fix for trac #1227

Location:

sage

Files:

• rings/polynomial/multi_polynomial_ideal.py (modified) (1 diff)
• structure/sequence.py (modified) (2 diffs)

sage/rings/polynomial/multi_polynomial_ideal.py

@@ -466 +466 @@
         T = Sequence([ MPolynomialIdeal(Q,[f._sage_(Q) for f in t]) for t in Tbar ])
 
+        def f(x,y): return cmp(x.gens(), y.gens())
+        T.sort(f)
+
         return T
     

sage/structure/sequence.py

@@ -362 +362 @@
         list.remove(self, value)
 
-    def sort(self):
-        """
-        Sort this list.
+    def sort(self, cmp=None, key=None, reverse=False):
+        """
+        Sort this list *IN PLACE*.
+
+        cmp(x, y) -> -1, 0, 1
 
         EXAMPLES:
@@ -371 +373 @@
             sage: B
             [1/5, 2, 3]
-        """
-        self._require_mutable()
-        list.sort(self)
+            sage: B.sort(reverse=True); B
+            [3, 2, 1/5]
+            sage: B.sort(cmp = lambda x,y: cmp(y,x)); B
+            [3, 2, 1/5]
+            sage: B.sort(cmp = lambda x,y: cmp(y,x), reverse=True); B
+            [1/5, 2, 3]
+        """
+        self._require_mutable()
+        list.sort(self, cmp=cmp, key=key, reverse=reverse)
 
     def __hash__(self):