Updates:
        Blockedon: 1231

Comment #2 on issue 1230 by ondrej.certik: limit((tan x)**(tan 2x), x,  
pi/4) doesnt work
http://code.google.com/p/sympy/issues/detail?id=1230

If you want to debug it, use:

$ git diff
diff --git a/sympy/series/gruntz.py b/sympy/series/gruntz.py
index eb9c2cc..fb34053 100644
--- a/sympy/series/gruntz.py
+++ b/sympy/series/gruntz.py
@@ -137,7 +137,7 @@ def debug(func):
      It will print a nice execution tree with arguments and results
      of all decorated functions.
      """
-    if 1:
+    if 0:
          #normal mode - do nothing
          return func


Then you discover, that the problem (or another problem) is with this limit:

In [1]: limit(tan(pi/2+x), x, 0)
Out[1]:
    ⎛π⎞
tan⎜─⎟
    ⎝2⎠


The limit calculates a limit from the right, so this should be "-oo"  
instead.

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