Re: [Maxima-discuss] pytranslate, for loop

[Lakshya A A. <lak...@gm...>]

I have added support for the following forms of "for" loops(at Sourceforge
Fork
<https://sourceforge.net/u/philomath/maxima_translate/ci/translation/tree/share/pytranslate/>
):

1. for variable: initial_value step increment thru limit do body2. for
variable: initial_value step increment while condition do body3. for
variable: initial_value step increment unless condition do body4. for
variable in list do body

     The form with limit specified is converted to a Python-for loop with
range() function. The loop with condition specified is converted to a while
loop, and the loop through list is converted to a Python for loop.
Example conversions(from rtest_pytranslate.mac
<https://sourceforge.net/u/philomath/maxima_translate/ci/translation/tree/share/pytranslate/rtest_pytranslate.mac>
):

/*for loop*//* In List */for i in [1,2,3] do print(i)"for i in [1, 2, 3]:
    print(i)"$
for i in [1,2,3] do (print(i), print(i*2))"for i in [1, 2, 3]:
    print(i)
    print((2 * i))"$
/* Initial, increment and limit values specified */for i from 1 step 3
thru 5 do print(i)"for i in range(1, (5 + 1), 3):
    print(i)"$for i from 1 step 3 thru 5 do (print(i), a:20+i,
print(i*a))"for i in range(1, (5 + 1), 3):
    print(i)
    a = (20 + i)
    print((a * i))"$
/* Initial, increment and condition specified *//* while condition
*/for i:10 step 5 while i*5<70 do (print(i), print(5*i))"i = 10
while not(((5 * i) >= 70)):
    print(i)
    print((5 * i))
    i = (i + 5)
del i"$/* unless condition */    for i:8 step -1 unless i<3 do (print(i))"i = 8
while not((i < 3)):
    print(i)
    i = (i + -1)
del i"$for i:8 step -1 unless i<3 do print(i)"i = 8
while not((i < 3)):
    print(i)
    i = (i + -1)
del i"$

Looking forward to the community's guidance and feedback.

Regards
Lakshya A Agrawal

On Thu, 13 Jun 2019 at 14:24, Lakshya A Agrawal <lak...@gm...>
wrote:

> pytranslate('  (for i:1 thru 10 do f(i))  );
>> does not work. returns
>>      "DO(I, 1, None, None, 10, None, F(I))"
>
> Sir, I have not yet implemented translation for loops. I will post an
> update once that is done.
>
> It would be interesting to me if one could do this in Maxima...
>>
>> say  P is a string that is a Python function definition  for
>> a function F that takes particular arguments , does some
>> computation (perhaps with side effects) and returns
>> a value.  Then to have a maxima command
>>
> Regarding this, and the discussion about CL-Python, maybe, if there is a
> consensus in the community, I could explore it upon the completion of the
> current project, i.e., to make a Maxima to Python Translator.
>
> I appreciate everyone's feedback and look forward to further guidance.
>
> Regards
> Lakshya A Agrawal
>
> On Thu, 13 Jun 2019 at 11:58, Elias Mårtenson <lo...@gm...> wrote:
>
>> On Thu, 13 Jun 2019 at 12:01, Richard Fateman <fa...@be...>
>> wrote:
>>
>>>
>>> =
>>> According to the documentation, CLPython works in many
>>> different lisps...  maybe running arbitrary Python code
>>> without leaving Maxima can be simply achieved.
>>>
>>> Lots of neat code is in the Python world.
>>>
>>
>> I'm sure there is. I personally am not a huge fan of Python (to say the
>> least) so I leave that for others.
>>
>> I think my original reply was based on a misunderstanding about what
>> Richard was asking about.
>>
>> Regards,
>> Elias
>>
>