IPython/Extensions/ipipe.py (xiter): Make sure that iterating

a string containing a single line yields the string itself as the
only item.

IPython/Extensions/ibrowse.py (ibrowse): Avoid entering an
object if it's the same as the one on the last level (This avoids
infinite recursion for one line strings).

IPython/Extensions/ibrowse.py

@@ -925,6 +925,10 b' class ibrowse(ipipe.Display):'
         Enter the object ``item``. If ``attrs`` is specified, it will be used
         as a fixed list of attributes to display.
         """
+        if self.levels and item is self.levels[-1].input:
+            curses.beep()
+            self.report(CommandError("Recursion on input object"))
+        else:
         oldlevels = len(self.levels)
         self._calcheaderlines(oldlevels+1)
         try:

IPython/Extensions/ipipe.py

@@ -943,7 +943,13 b' def xiter(item):'
         elif _isstr(item):
             if not item:
                 raise ValueError("can't enter empty string")
-            return iter(item.splitlines())
+            lines = item.splitlines()
+            if len(lines) == 1:
+               def iterone(item):
+                   yield item
+               return iterone(item)
+            else:
+                return iter(lines)
         return iter(item)
     else:
         return iter(func()) # iter() just to be safe

doc/ChangeLog

@@ -1,3 +1,13 b''
[phone]  Walter Doerwald  <[e-mail]>
+
+	* IPython/Extensions/ipipe.py (xiter): Make sure that iterating
+	a string containing a single line yields the string itself as the
+	only item.
+
+	* IPython/Extensions/ibrowse.py (ibrowse): Avoid entering an
+	object if it's the same as the one on the last level (This avoids
+	infinite recursion for one line strings).
+
 2007-01-17  Fernando Perez  <[e-mail]>
 
 	* IPython/ultraTB.py (AutoFormattedTB.__call__): properly flush