Mixing GP and @interact inside Sage Cell

[Pedja]

Why the following code doesn't work inside Sage Cell?

gp("""
square(x)=x^2;
""")

@interact
def _(x=2):
    print(square(x))

[Dima Pasechnik]

this way Python does not know anything about GP functions.

You need to pass the input/output from/to Python.

--
You received this message because you are subscribed to the Google Groups "sage-support" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sage-support...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/25a5f980-f93d-4721-94d4-e5f1677b285d%40googlegroups.com.

[Dima Pasechnik]

e.g. something like

sage: gp.eval("square(x)=x^2")
'(x)->x^2'
sage: gp.function_call("square",[20]).sage()
400

So one can have

def foo(x):
return gp.function_call("square",[x]).sage()

to create a Sage function that will square a number using GP

[Pedja Terzic]

Thank you, it works!

To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/CAAWYfq0rwwUEQFxmexC9vn8PaLczFSBFGSekYQFQMKi5bTPFFw%40mail.gmail.com.

[Vincent Delecroix]

If you want to interact with PARI/GP it is much better (= faster and
more reliable) to use the cypari interface. Namely

sage: s = pari('square(x)=x^2')
sage: s(20)
400

If you want to convert the output of s(20) (a "Gen") then use

sage: s(20).sage()
400
sage: type(s20)
<class 'cypari2.gen.Gen'>
sage: type(s(20).sage())
<class 'sage.rings.integer.Integer'>

Vincent

>> https://groups.google.com/d/msgid/sage-support/CAAWYfq0rwwUEQFxmexC9vn8PaLczFSBFGSekYQFQMKi5bTPFFw%40mail.gmail.com
>> .
>>
>