Changeset 3169:3d257489c962

Timestamp:

02/26/07 18:11:40 (6 years ago)

Author:

dmharvey@…

Branch:

default

Children:

3170:4bb962433a53, 3171:60fe63609b52

Message:

faster list() method for polys in Z[x]

Location:

sage

Files:

• libs/ntl/ntl.pyx (modified) (3 diffs)
• rings/polynomial_element_generic.py (modified) (1 diff)

sage/libs/ntl/ntl.pyx

@@ -30 +30 @@
 from sage.rings.integer import Integer
 from sage.rings.integer cimport Integer
-#cimport sage.rings.integer
 
 
@@ -329 +328 @@
         """
         cdef Integer output
-        output = Integer()
+        output = PY_NEW(Integer)
         ZZX_getitem_as_mpz(&output.value, self.x, i)
         return output
@@ -356 +355 @@
         """
         return self.getitem_as_int(i)
+
+    def list(self):
+        r"""
+        Retrieves coefficients as a list of SAGE Integers.
+        
+        EXAMPLES:
+            sage: x = ntl.ZZX([129381729371289371237128318293718237, 2, -3, 0, 4])
+            sage: L = x.list(); L
+            [129381729371289371237128318293718237, 2, -3, 0, 4]
+            sage: type(L[0])
+            <type 'sage.rings.integer.Integer'>
+            sage: x = ntl.ZZX()
+            sage: L = x.list(); L
+            []
+        """
+        cdef int i
+        return [self[i] for i from 0 <= i <= ZZX_degree(self.x)]
+    
 
     def __add__(ntl_ZZX self, ntl_ZZX other):

sage/rings/polynomial_element_generic.py

@@ -1481 +1481 @@
             sage: f.list()
             [-17, 3, 0, 1]
-        """
-        return [ZZ(str(self.__poly[i])) for i in xrange(self.degree()+1)]
+            sage: f = PolynomialRing(ZZ,'x')(0)
+            sage: f.list()
+            []
+        """
+        return self.__poly.list()
+    
 
     def resultant(self, other):