Re: [babel] python sessions

[Eric Schulte <schulte.eric@gmail.com>]

Andrea Crotti <andrea.crotti.0@gmail.com> writes:

> Eric Schulte <schulte.eric@gmail.com> writes:
>>
>> This is true, in addition to being a language which is dependent upon
>> whitespace characters, python has been tricky due to the many
>> independent inferior python modes (python.el, python-mode.el, etc...)
>> and to the fact that I personally and not very familiar with the
>> language.
>
> That is indeed a problem (also in cedet for example) and I really would
> like to have just one and working well python mode, not a thousand.. 
>

From what I hear the situation should improve in Emacs24, as there is a
ground up re-write which should contain much of the functionality of
python-mode.el with the Emacs-amenable license of python.el.

>
>>
>> I've just pushed up a patch which should improve upon the python session
>> behavior.  After this patch your example returns the following
>> results...
>>
>> #+begin_src python :session :results silent
>>   def var(x):
>>       return float(x ** 2)
>> #+end_src
>>
>> #+begin_src python :session :result value
>>   def var2(x):
>>       return x ** 2 * var(x)
>>   
>>   var2(10)
>> #+end_src
>>
>> #+results:
>> : 10000.0
>>
>
> That example now works like a charm
> But here still I get that string, but if I tangle the file I get the
> correct result, any idea?
>

The eoe string will only even appear in session output when there is no
other result returned by the code block.  I've just pushed up a small
change which should fix this situation.

The eoe will never appear in tangled code as it is part of the
interactive session evaluation.

Best -- Eric

>
> #+begin_src python :session :tangle myset.py :results silent
>   class MySetList(object):
>   
>       def __init__(self):
>           self._set = []
>   
>       def add(self, el):
>           if el not in self._set:
>               self._set.append(el)
>   
>       # implementation of other typical set functions
> #+end_src
>
> #+begin_src python :session :tangle myset.py :results silent
>   class MySetDict(object):
>   
>       def __init__(self):
>           self._dic = {}
>   
>       def add(self, el):
>           if el not in self._dic:
>               # we only care about the keys
>               self._dic[el] = None
> #+end_src
>
> #+begin_src python :session :tangle myset.py :results silent
>   class MySetSet(object):
>       def __init__(self):
>           self._set = set()
>       
>       def add(self, el):
>           self._set.add(el)
> #+end_src
>
>
> #+begin_src python :session :exports both :tangle myset.py
>   import timeit
>   import random
>   
>   NUM_ELS = 100
>   
>       
>   def add_many_to_set(set_type):
>       m = set_type()
>       for i in range(NUM_ELS):
>           m.add(i)
>   
>   
>   def test_impl(set_type):
>       to_import = """
>   from __main__ import add_many_to_set
>   from __main__ import %s"""
>   
>       name = set_type.__name__
>       print("testing %s" % name)
>       return timeit.timeit("add_many_to_set(%s)" % name,
>                            setup=(to_import % name))
>   
>   
>   test_impl(MySetList), test_impl(MySetDict), test_impl(MySetSet)
>   
> #+end_src

-- 
Eric Schulte
http://cs.unm.edu/~eschulte/