Ticket #2171: sage-trac2171-part1.patch

sage/interfaces/expect.py

@@ -1087 +1087 @@
         return self.eval(var)
 
     def get_using_file(self, var):
+        """
+        Return the string representation of the variable var in self
+        using a file.  Use this if var has a huge string
+        representation.  It'll be way faster.
+        """
         return self.get(var)
 
     def clear(self, var):
@@ -1415 +1420 @@
         if attrname[:1] == "_":
             raise AttributeError
         return P._function_element_class()(self, attrname)
+
+    def get_using_file(self):
+        """
+        Return this element's string representation using a file.  Use
+        this if self has a huge string representation.  It'll be way
+        faster.
+
+        EXAMPLES:
+            sage: a = maxima(str(2^1000))
+            sage: a.get_using_file()
+            '10715086071862673209484250490600018105614048117055336074437503883703510511249361224931983788156958581275946729175531468251871452856923140435984577574698574803934567774824230985421074605062371141877954182153046474983581941267398767559165543946077062914571196477686542167660429831652624386837205668069376'
+        """
+        try:
+            self._check_valid()
+        except ValueError:
+            return '(invalid object -- defined in terms of closed session)'
+        return self.parent().get_using_file(self._name)
 
     def hasattr(self, attrname):
         """

sage/interfaces/maple.py

@@ -185 +185 @@
         
 More complicated programs should be put in a separate file and
 loaded.
+
+TESTS:
+We send a fairly large input to Maple and get the output back from Maple.
+    sage: s = str(3^100000)
+    sage: len(s)
+    47713 
+    sage: a = maple(s)      # uses a file to send s to Maple
+    sage: k = str(a)        # uses a file to get this from Maple
+    sage: k == s
+    True
+
 """
 
 #############################################################################
@@ -201 +212 @@
 
 from expect import Expect, ExpectElement, ExpectFunction, FunctionElement, gc_disabled
 
+from random import randrange
+
 import pexpect
 
-from sage.misc.misc import verbose, DOT_SAGE
+from sage.misc.misc import verbose, DOT_SAGE, tmp_filename
 from sage.misc.pager import pager
 
 COMMANDS_CACHE = '%s/maple_commandlist_cache.sobj'%DOT_SAGE
@@ -856 +869 @@
 
             sage: M = matrix(ZZ, 2, range(1,5))
             sage: Mm = maple(M)
-            sage: Mm == Mm
+            sage: Mm == Mm           # random output
             True
-            sage: Mm < 5
+            sage: Mm < 5             # random output
             True
-            sage: (Mm < 5) == (M < 5)
+            sage: (Mm < 5) == (M < 5)    # random output -- depends on machine
             True
-            sage: 5 < Mm
+            sage: 5 < Mm                # random output -- depends on machine
             False
 
         TESTS: