[O] Need control over insertion point of variables in code blocks

[Dirk Scharff]

Hi

i just noticed that variables are assigned in the top of the exported code. 
That can be problematic in some situations:

#+source: the_test
#+begin_src python :var x=3 :tangle test.py :results output
from __future__ import division
print x
#+end_src


tangling results in:

x=3
from __future__ import division
print x

The problem with the result is simple: 
SyntaxError: from __future__ imports must occur at the beginning of the file

To export this correctly I'd need the possibility to tell org-mode where the 
variables are supposed to be inserted. Is there a way to do this? I didn't find 
a keyword for this in the documentation. 

A second problem I have at the moment lies with the execution of source-blocks 
in tables. What I'd like to do:

| argument | result |
|        1 | #ERROR |
|          |        |
#+TBLFM: $2=call_the_test(x=$<)

I guess I'm just doing something wrong here. Executing the #+Tblfm results in 
the error: "reference $< not found in buffer". How do I do the reference 
correctly in this case? 

You can test both cases in the attached org-file.

testing.org
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